Decoding Your 2002 Ford Taurus OBD2 Codes: A Comprehensive Guide

Navigating car trouble can be frustrating, especially when the check engine light illuminates in your 2002 Ford Taurus. Fortunately, modern vehicles like your Taurus are equipped with an On-Board Diagnostics system, specifically OBD2, which helps pinpoint potential issues. Understanding the meaning behind the OBD2 codes your Ford Taurus might be throwing is the first step towards effective diagnosis and repair. This guide provides a detailed reference to help you decipher those codes and get your 2002 Ford Taurus running smoothly again.

Understanding OBD2 Systems and Your 2002 Ford Taurus

The OBD2 (On-Board Diagnostics II) system is standardized across most vehicles manufactured after 1996, including your 2002 Ford Taurus. Its primary function is to monitor various systems within your car, from the engine and transmission to emissions control. When the system detects a problem outside of normal parameters, it triggers the check engine light and stores a Diagnostic Trouble Code (DTC). These codes are your car’s way of telling you where it perceives an issue.

OBD2 codes are structured in a specific format, making them universally understandable. Each code starts with a letter indicating the system affected:

P (Powertrain): Relates to the engine, transmission, and related components. This is the most common category for check engine light codes.
C (Chassis): Deals with mechanical systems and control, such as braking, steering, and suspension.
B (Body): Concerns body-related functions like airbags, power windows, and central locking.
U (Network Communication): Indicates issues within the vehicle’s computer network.

Following the letter, a four-digit number further specifies the problem area and the nature of the fault. For 2002 Ford Taurus owners, becoming familiar with these codes can save time and money on unnecessary repairs by providing valuable insights before visiting a mechanic.

2002 Ford Taurus OBD2 Code Breakdown: A Detailed List

While specific codes for a 2002 Ford Taurus will be the same as general OBD2 codes, understanding the context of your vehicle is important. This comprehensive list covers a wide range of potential OBD2 codes your 2002 Ford Taurus might display. Remember to use an OBD2 scanner to retrieve the exact code from your vehicle before consulting this list.

P00XX Codes: Fuel and Air Metering & Auxiliary Emission Controls

These codes often relate to issues affecting your 2002 Ford Taurus’s engine efficiency and emissions.

P0010 “A” Camshaft Position Actuator Circuit (Bank 1): Indicates a problem with the circuit controlling the camshaft position actuator on bank 1.
P0011 “A” Camshaft Position – Timing Over-Advanced or System Performance (Bank 1): Signals that the camshaft timing is more advanced than expected on bank 1.
P0012 “A” Camshaft Position – Timing Over-Retarded (Bank 1): Indicates the camshaft timing is more retarded than expected on bank 1.
P0013 “B” Camshaft Position – Actuator Circuit (Bank 1): Similar to P0010 but for the “B” camshaft actuator on bank 1.
P0014 “B” Camshaft Position – Timing Over-Advanced or System Performance (Bank 1): Similar to P0011 but for the “B” camshaft on bank 1.
P0015 “B” Camshaft Position -Timing Over-Retarded (Bank 1): Similar to P0012 but for the “B” camshaft on bank 1.
P0020 “A” Camshaft Position Actuator Circuit (Bank 2): Same as P0010, but for bank 2.
P0021 “A” Camshaft Position – Timing Over-Advanced or System Performance (Bank 2): Same as P0011, but for bank 2.
P0022 “A” Camshaft Position – Timing Over-Retarded (Bank 2): Same as P0012, but for bank 2.
P0023 “B” Camshaft Position – Actuator Circuit (Bank 2): Same as P0013, but for bank 2.
P0024 “B” Camshaft Position – Timing Over-Advanced or System Performance (Bank 2): Same as P0014, but for bank 2.
P0025 “B” Camshaft Position – Timing Over-Retarded (Bank 2): Same as P0015, but for bank 2.
P0030 HO2S Heater Control Circuit (Bank 1 Sensor 1): Indicates an issue with the heater circuit of the oxygen sensor (HO2S) located in bank 1, sensor 1.
P0031 HO2S Heater Control Circuit Low (Bank 1 Sensor 1): Signals a low voltage in the heater control circuit of the bank 1, sensor 1 oxygen sensor.
P0032 HO2S Heater Control Circuit High (Bank 1 Sensor 1): Indicates a high voltage in the heater control circuit of the bank 1, sensor 1 oxygen sensor.
P0033 Turbo Charger Bypass Valve Control Circuit: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Indicates a problem with the turbocharger bypass valve control circuit.
P0034 Turbo Charger Bypass Valve Control Circuit Low: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Signals a low voltage in the turbocharger bypass valve control circuit.
P0035 Turbo Charger Bypass Valve Control Circuit High: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Indicates a high voltage in the turbocharger bypass valve control circuit.
P0036 HO2S Heater Control Circuit (Bank 1 Sensor 2): Similar to P0030, but for bank 1, sensor 2.
P0037 HO2S Heater Control Circuit Low (Bank 1 Sensor 2): Similar to P0031, but for bank 1, sensor 2.
P0038 HO2S Heater Control Circuit High (Bank 1 Sensor 2): Similar to P0032, but for bank 1, sensor 2.
P0042 HO2S Heater Control Circuit (Bank 1 Sensor 3): Similar to P0030, but for bank 1, sensor 3 (less common on a 2002 Taurus).
P0043 HO2S Heater Control Circuit Low (Bank 1 Sensor 3): Similar to P0031, but for bank 1, sensor 3 (less common on a 2002 Taurus).
P0044 HO2S Heater Control Circuit High (Bank 1 Sensor 3): Similar to P0032, but for bank 1, sensor 3 (less common on a 2002 Taurus).
P0050 HO2S Heater Control Circuit (Bank 2 Sensor 1): Similar to P0030, but for bank 2, sensor 1.
P0051 HO2S Heater Control Circuit Low (Bank 2 Sensor 1): Similar to P0031, but for bank 2, sensor 1.
P0052 HO2S Heater Control Circuit High (Bank 2 Sensor 1): Similar to P0032, but for bank 2, sensor 1.
P0056 HO2S Heater Control Circuit (Bank 2 Sensor 2): Similar to P0030, but for bank 2, sensor 2.
P0057 HO2S Heater Control Circuit Low (Bank 2 Sensor 2): Similar to P0031, but for bank 2, sensor 2.
P0058 HO2S Heater Control Circuit High (Bank 2 Sensor 2): Similar to P0032, but for bank 2, sensor 2.
P0062 HO2S Heater Control Circuit (Bank 2 Sensor 3): Similar to P0030, but for bank 2, sensor 3 (less common on a 2002 Taurus).
P0063 HO2S Heater Control Circuit Low (Bank 2 Sensor 3): Similar to P0031, but for bank 2, sensor 3 (less common on a 2002 Taurus).
P0064 HO2S Heater Control Circuit High (Bank 2 Sensor 3): Similar to P0032, but for bank 2, sensor 3 (less common on a 2002 Taurus).
P0065 Air Assisted Injector Control Range/Performance: Relates to the air-assisted injector system, if equipped.
P0066 Air Assisted Injector Control Circuit or Circuit Low: Indicates a low voltage or circuit issue with the air-assisted injector control.
P0067 Air Assisted Injector Control Circuit High: Indicates a high voltage in the air-assisted injector control circuit.
P0070 Ambient Air Temperature Sensor Circuit: Problem with the ambient air temperature sensor circuit.
P0071 Ambient Air Temperature Sensor Range/Performance: Ambient air temperature sensor readings are out of expected range.
P0072 Ambient Air Temperature Sensor Circuit Low Input: Low voltage signal from the ambient air temperature sensor.
P0073 Ambient Air Temperature Sensor Circuit High Input: High voltage signal from the ambient air temperature sensor.
P0074 Ambient Air Temperature Sensor Circuit Intermittent: Intermittent signal from the ambient air temperature sensor.
P0075 Intake Valve Control Solenoid Circuit (Bank 1): Circuit issue with the intake valve control solenoid on bank 1.
P0076 Intake Valve Control Solenoid Circuit Low (Bank 1): Low voltage in the intake valve control solenoid circuit on bank 1.
P0077 Intake Valve Control Solenoid Circuit High (Bank 1): High voltage in the intake valve control solenoid circuit on bank 1.
P0078 Exhaust Valve Control Solenoid Circuit (Bank 1): Circuit issue with the exhaust valve control solenoid on bank 1.
P0079 Exhaust Valve Control Solenoid Circuit Low (Bank 1): Low voltage in the exhaust valve control solenoid circuit on bank 1.
P0080 Exhaust Valve Control Solenoid Circuit High (Bank 1): High voltage in the exhaust valve control solenoid circuit on bank 1.
P0081 Intake valve Control Solenoid Circuit (Bank 2): Circuit issue with the intake valve control solenoid on bank 2.
P0082 Intake Valve Control Solenoid Circuit Low (Bank 2): Low voltage in the intake valve control solenoid circuit on bank 2.
P0083 Intake Valve Control Solenoid Circuit High (Bank 2): High voltage in the intake valve control solenoid circuit on bank 2.
P0084 Exhaust Valve Control Solenoid Circuit (Bank 2): Circuit issue with the exhaust valve control solenoid on bank 2.
P0085 Exhaust Valve Control Solenoid Circuit Low (Bank 2): Low voltage in the exhaust valve control solenoid circuit on bank 2.
P0086 Exhaust Valve Control Solenoid Circuit High (Bank 2): High voltage in the exhaust valve control solenoid circuit on bank 2.

P01XX Codes: Fuel and Air Metering

These codes commonly indicate problems with the Mass Air Flow (MAF) sensor, oxygen sensors, or fuel trim, all crucial for engine performance in your 2002 Ford Taurus.

P0100 Mass or Volume Air Flow Circuit: Problem in the Mass Air Flow (MAF) sensor circuit.
P0101 Mass or Volume Air Flow Circuit Range/Performance Problem: MAF sensor readings are not within the expected range.
P0102 Mass or Volume Air Flow Circuit Low Input: Low voltage signal from the MAF sensor.
P0103 Mass or Volume Air Flow Circuit High Input: High voltage signal from the MAF sensor.
P0104 Mass or Volume Air Flow Circuit Intermittent: Intermittent signal from the MAF sensor.
P0105 Manifold Absolute Pressure/Barometric Pressure Circuit: Problem in the Manifold Absolute Pressure (MAP) or Barometric Pressure sensor circuit.
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem: MAP/Barometric sensor readings are out of range.
P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input: Low voltage signal from the MAP/Barometric sensor.
P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input: High voltage signal from the MAP/Barometric sensor.
P0109 Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent: Intermittent signal from the MAP/Barometric sensor.
P0110 Intake Air Temperature Circuit: Problem in the Intake Air Temperature (IAT) sensor circuit.
P0111 Intake Air Temperature Circuit Range/Performance Problem: IAT sensor readings are out of range.
P0112 Intake Air Temperature Circuit Low Input: Low voltage signal from the IAT sensor.
P0113 Intake Air Temperature Circuit High Input: High voltage signal from the IAT sensor.
P0114 Intake Air Temperature Circuit Intermittent: Intermittent signal from the IAT sensor.
P0115 Engine Coolant Temperature Circuit: Problem in the Engine Coolant Temperature (ECT) sensor circuit.
P0116 Engine Coolant Temperature Circuit Range/Performance Problem: ECT sensor readings are out of range.
P0117 Engine Coolant Temperature Circuit Low Input: Low voltage signal from the ECT sensor.
P0118 Engine Coolant Temperature Circuit High Input: High voltage signal from the ECT sensor.
P0119 Engine Coolant Temperature Circuit Intermittent: Intermittent signal from the ECT sensor.
P0120 Throttle/Pedal Position Sensor/Switch A Circuit: Problem in the Throttle Position Sensor (TPS) or Pedal Position Sensor circuit (sensor A).
P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem: TPS/Pedal Position Sensor (A) readings are out of range.
P0122 Throttle/Pedal Position Sensor/Switch A Circuit Low Input: Low voltage signal from TPS/Pedal Position Sensor (A).
P0123 Throttle/Pedal Position Sensor/Switch A Circuit High Input: High voltage signal from TPS/Pedal Position Sensor (A).
P0124 Throttle/Pedal Position Sensor/Switch A Circuit Intermittent: Intermittent signal from TPS/Pedal Position Sensor (A).
P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control: Engine coolant is not reaching the required temperature for closed-loop fuel control.
P0126 Insufficient Coolant Temperature for Stable Operation: Engine coolant is too cold for stable engine operation.
P0127 Intake Air Temperature Too High: Intake air temperature is excessively high.
P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature): Coolant temperature is below the thermostat’s regulating temperature, potentially indicating a thermostat issue.
P0130 O2 Sensor Circuit (Bank 1 Sensor 1): Problem in the oxygen sensor circuit (Bank 1, Sensor 1).
P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1): Low voltage signal from the oxygen sensor (Bank 1, Sensor 1).
P0132 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1): High voltage signal from the oxygen sensor (Bank 1, Sensor 1).
P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1): Slow response from the oxygen sensor (Bank 1, Sensor 1).
P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1): No signal detected from the oxygen sensor (Bank 1, Sensor 1).
P0135 O2 Sensor Heater Circuit (Bank 1 Sensor 1): Problem in the oxygen sensor heater circuit (Bank 1, Sensor 1).
P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2): Problem in the oxygen sensor circuit (Bank 1, Sensor 2).
P0137 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2): Low voltage signal from the oxygen sensor (Bank 1, Sensor 2).
P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2): High voltage signal from the oxygen sensor (Bank 1, Sensor 2).
P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2): Slow response from the oxygen sensor (Bank 1, Sensor 2).
P0140 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2): No signal detected from the oxygen sensor (Bank 1, Sensor 2).
P0141 O2 Sensor Heater Circuit (Bank 1 Sensor 2): Problem in the oxygen sensor heater circuit (Bank 1, Sensor 2).
P0142 O2 Sensor Circuit Malfunction (Bank 1 Sensor 3): Problem in the oxygen sensor circuit (Bank 1, Sensor 3).
P0143 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3): Low voltage signal from the oxygen sensor (Bank 1, Sensor 3).
P0144 O2 Sensor Circuit High Voltage (Bank 1 Sensor 3): High voltage signal from the oxygen sensor (Bank 1, Sensor 3).
P0145 O2 Sensor Circuit Slow Response (Bank 1 Sensor 3): Slow response from the oxygen sensor (Bank 1, Sensor 3).
P0146 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3): No signal detected from the oxygen sensor (Bank 1, Sensor 3).
P0147 O2 Sensor Heater Circuit (Bank 1 Sensor 3): Problem in the oxygen sensor heater circuit (Bank 1, Sensor 3).
P0148 Fuel Delivery Error: General fuel delivery problem.
P0149 Fuel Timing Error: Problem with fuel injection timing.
P0150 O2 Sensor Circuit (Bank 2 Sensor 1): Problem in the oxygen sensor circuit (Bank 2, Sensor 1).
P0151 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1): Low voltage signal from the oxygen sensor (Bank 2, Sensor 1).
P0152 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): High voltage signal from the oxygen sensor (Bank 2, Sensor 1).
P0153 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1): Slow response from the oxygen sensor (Bank 2, Sensor 1).
P0154 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1): No signal detected from the oxygen sensor (Bank 2, Sensor 1).
P0155 O2 Sensor Heater Circuit (Bank 2 Sensor 1): Problem in the oxygen sensor heater circuit (Bank 2, Sensor 1).
P0156 O2 Sensor Circuit Malfunction (Bank 2 Sensor 2): Problem in the oxygen sensor circuit (Bank 2, Sensor 2).
P0157 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2): Low voltage signal from the oxygen sensor (Bank 2, Sensor 2).
P0158 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2): High voltage signal from the oxygen sensor (Bank 2, Sensor 2).
P0159 O2 Sensor Circuit Slow Response (Bank 2 Sensor 2): Slow response from the oxygen sensor (Bank 2, Sensor 2).
P0160 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2): No signal detected from the oxygen sensor (Bank 2, Sensor 2).
P0161 O2 Sensor Heater Circuit (Bank 2 Sensor 2): Problem in the oxygen sensor heater circuit (Bank 2, Sensor 2).
P0162 O2 Sensor Circuit Malfunction (Bank 2 Sensor 3): Problem in the oxygen sensor circuit (Bank 2, Sensor 3).
P0163 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3): Low voltage signal from the oxygen sensor (Bank 2, Sensor 3).
P0164 O2 Sensor Circuit High Voltage (Bank 2 Sensor 3): High voltage signal from the oxygen sensor (Bank 2, Sensor 3).
P0165 O2 Sensor Circuit Slow Response (Bank 2 Sensor 3): Slow response from the oxygen sensor (Bank 2, Sensor 3).
P0166 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3): No signal detected from the oxygen sensor (Bank 2, Sensor 3).
P0167 O2 Sensor Heater Circuit (Bank 2 Sensor 3): Problem in the oxygen sensor heater circuit (Bank 2, Sensor 3).
P0168 Fuel Temperature Too High: Fuel temperature is excessively high.
P0169 Incorrect Fuel Composition: Fuel composition is not within expected parameters.
P0170 Fuel Trim (Bank 1): Problem with fuel trim on bank 1.
P0171 System too Lean (Bank 1): Air-fuel mixture is too lean on bank 1.
P0172 System too Rich (Bank 1): Air-fuel mixture is too rich on bank 1.
P0173 Fuel Trim Malfunction (Bank 2): Problem with fuel trim on bank 2.
P0174 System too Lean (Bank 2): Air-fuel mixture is too lean on bank 2.
P0175 System too Rich (Bank 2): Air-fuel mixture is too rich on bank 2.
P0176 Fuel Composition Sensor Circuit: Problem in the fuel composition sensor circuit.
P0177 Fuel Composition Sensor Circuit Range/Performance: Fuel composition sensor readings are out of range.
P0178 Fuel Composition Sensor Circuit Low Input: Low voltage signal from the fuel composition sensor.
P0179 Fuel Composition Sensor Circuit High Input: High voltage signal from the fuel composition sensor.
P0180 Fuel Temperature Sensor A Circuit: Problem in fuel temperature sensor A circuit.
P0181 Fuel Temperature Sensor A Circuit Range/Performance: Fuel temperature sensor A readings are out of range.
P0182 Fuel Temperature Sensor A Circuit Low Input: Low voltage signal from fuel temperature sensor A.
P0183 Fuel Temperature Sensor A Circuit High Input: High voltage signal from fuel temperature sensor A.
P0184 Fuel Temperature Sensor A Circuit Intermittent: Intermittent signal from fuel temperature sensor A.
P0185 Fuel Temperature Sensor B Circuit: Problem in fuel temperature sensor B circuit.
P0186 Fuel Temperature Sensor B Circuit Range/Performance: Fuel temperature sensor B readings are out of range.
P0187 Fuel Temperature Sensor B Circuit Low Input: Low voltage signal from fuel temperature sensor B.
P0188 Fuel Temperature Sensor B Circuit High Input: High voltage signal from fuel temperature sensor B.
P0189 Fuel Temperature Sensor B Circuit Intermittent: Intermittent signal from fuel temperature sensor B.
P0190 Fuel Rail Pressure Sensor Circuit: Problem in the fuel rail pressure sensor circuit.
P0191 Fuel Rail Pressure Sensor Circuit Range/Performance: Fuel rail pressure sensor readings are out of range.
P0192 Fuel Rail Pressure Sensor Circuit Low In put: Low voltage signal from the fuel rail pressure sensor.
P0193 Fuel Rail Pressure Sensor Circuit High Input: High voltage signal from the fuel rail pressure sensor.
P0194 Fuel Rail Pressure Sensor Circuit Intermittent: Intermittent signal from the fuel rail pressure sensor.
P0195 Engine Oil Temperature Sensor: Problem with the engine oil temperature sensor.
P0196 Engine Oil Temperature Sensor Range/Performance: Engine oil temperature sensor readings are out of range.
P0197 Engine Oil Temperature Sensor Low: Low reading from the engine oil temperature sensor.
P0198 Engine Oil Temperature Sensor High: High reading from the engine oil temperature sensor.
P0199 Engine Oil Temperature Sensor Intermittent: Intermittent signal from the engine oil temperature sensor.

P02XX Codes: Fuel and Air Metering (Injectors)

These codes are specific to fuel injector circuits and performance, important for fuel delivery in your 2002 Ford Taurus engine.

P0200 Injector Circuit: General problem with the injector circuit.
P0201 Injector Circuit – Cylinder 1: Problem in the injector circuit for cylinder 1.
P0202 Injector Circuit – Cylinder 2: Problem in the injector circuit for cylinder 2.
P0203 Injector Circuit – Cylinder 3: Problem in the injector circuit for cylinder 3.
P0204 Injector Circuit – Cylinder 4: Problem in the injector circuit for cylinder 4.
P0205 Injector Circuit – Cylinder 5: Problem in the injector circuit for cylinder 5.
P0206 Injector Circuit – Cylinder 6: Problem in the injector circuit for cylinder 6.
P0207 Injector Circuit – Cylinder 7: Problem in the injector circuit for cylinder 7.
P0208 Injector Circuit – Cylinder 8: Problem in the injector circuit for cylinder 8.
P0209 Injector Circuit – Cylinder 9: Problem in the injector circuit for cylinder 9.
P0210 Injector Circuit – Cylinder 10: Problem in the injector circuit for cylinder 10.
P0211 Injector Circuit – Cylinder 11: Problem in the injector circuit for cylinder 11.
P0212 Injector Circuit – Cylinder 12: Problem in the injector circuit for cylinder 12.
P0213 Cold Start Injector 1: Problem with cold start injector 1.
P0214 Cold Start Injector 2: Problem with cold start injector 2.
P0215 Engine Shutoff Solenoid: Problem with the engine shutoff solenoid.
P0216 Injector/Injection Timing Control Circuit: Problem in the injector or injection timing control circuit.
P0217 Engine Coolant Over Temperature Condition: Engine coolant temperature is too high.
P0218 Transmission Fluid Over Temperature Condition: Transmission fluid temperature is too high.
P0219 Engine Over Speed Condition: Engine speed is too high.
P0220 Throttle/Pedal Position Sensor/Switch “B” Circuit: Problem in the Throttle Position Sensor (TPS) or Pedal Position Sensor circuit (sensor B).
P0221 Throttle/Pedal Position Sensor/Switch “B” Circuit Range/Performance Problem: TPS/Pedal Position Sensor (B) readings are out of range.
P0222 Throttle/Pedal Position Sensor/Switch “B” Circuit Low Input: Low voltage signal from TPS/Pedal Position Sensor (B).
P0223 Throttle/Pedal Position Sensor/Switch “B” Circuit High Input: High voltage signal from TPS/Pedal Position Sensor (B).
P0224 Throttle/Pedal Position Sensor/Switch “B” Circuit Intermittent: Intermittent signal from TPS/Pedal Position Sensor (B).
P0225 Throttle/Pedal Position Sensor/Switch “C” Circuit: Problem in the Throttle Position Sensor (TPS) or Pedal Position Sensor circuit (sensor C).
P0226 Throttle/Pedal Position Sensor/Switch “C” Circuit Range/Performance Problem: TPS/Pedal Position Sensor (C) readings are out of range.
P0227 Throttle/Pedal Position Sensor/Switch “C” Circuit Low Input: Low voltage signal from TPS/Pedal Position Sensor (C).
P0228 Throttle/Pedal Position Sensor/Switch “C” Circuit High Input: High voltage signal from TPS/Pedal Position Sensor (C).
P0229 Throttle/Pedal Position Sensor/Switch “C” Circuit Intermittent: Intermittent signal from TPS/Pedal Position Sensor (C).
P0230 Fuel Pump Primary Circuit: Problem in the fuel pump primary circuit.
P0231 Fuel Pump Secondary Circuit Low: Low voltage in the fuel pump secondary circuit.
P0232 Fuel Pump Secondary Circuit High: High voltage in the fuel pump secondary circuit.
P0233 Fuel Pump Secondary Circuit Intermittent: Intermittent signal in the fuel pump secondary circuit.
P0234 Turbo/Super Charger Overboost Condition: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Turbocharger or supercharger overboost condition.
P0235 Turbo/Super Charger Boost Sensor “A” Circuit: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Problem in the turbo/supercharger boost sensor “A” circuit.
P0236 Turbo/Super Charger Boost Sensor “A” Circuit Range/Performance: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Turbo/supercharger boost sensor “A” readings are out of range.
P0237 Turbo/Super Charger Boost Sensor “A” Circuit Low: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Low voltage signal from turbo/supercharger boost sensor “A”.
P0238 Turbo/Super Charger Boost Sensor “A” Circuit High: (Not typically applicable to a standard 2002 Ford Taurus unless modified). High voltage signal from turbo/supercharger boost sensor “A”.
P0239 Turbo/Super Charger Boost Sensor “B” Circuit: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Problem in the turbo/supercharger boost sensor “B” circuit.
P0240 Turbo/Super Charger Boost Sensor “B” Circuit Range/Performance: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Turbo/supercharger boost sensor “B” readings are out of range.
P0241 Turbo/Super Charger Boost Sensor “B” Circuit Low: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Low voltage signal from turbo/supercharger boost sensor “B”.
P0242 Turbo/Super Charger Boost Sensor “B” Circuit High: (Not typically applicable to a standard 2002 Ford Taurus unless modified). High voltage signal from turbo/supercharger boost sensor “B”.
P0243 Turbo/Super Charger Wastegate Solenoid “A”: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Problem with turbo/supercharger wastegate solenoid “A”.
P0244 Turbo/Super Charger Wastegate Solenoid “A” Range/Performance: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Turbo/supercharger wastegate solenoid “A” performance issue.
P0245 Turbo/Super Charger Wastegate Solenoid “A” Low: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Low voltage to turbo/supercharger wastegate solenoid “A”.
P0246 Turbo/Super Charger Wastegate Solenoid “A” High: (Not typically applicable to a standard 2002 Ford Taurus unless modified). High voltage to turbo/supercharger wastegate solenoid “A”.
P0247 Turbo/Super Charger Wastegate Solenoid “B”: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Problem with turbo/supercharger wastegate solenoid “B”.
P0248 Turbo/Super Charger Wastegate Solenoid “B” Range/Performance: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Turbo/supercharger wastegate solenoid “B” performance issue.
P0249 Turbo/Super Charger Wastegate Solenoid “B” Low: (Not typically applicable to a standard 2002 Ford Taurus unless modified). Low voltage to turbo/supercharger wastegate solenoid “B”.
P0250 Turbo/Super Charger Wastegate Solenoid “B” High: (Not typically applicable to a standard 2002 Ford Taurus unless modified). High voltage to turbo/supercharger wastegate solenoid “B”.
P0251 Injection Pump Fuel Metering Control “A” (Cam/rotor/Injector): Problem with injection pump fuel metering control “A”.
P0252 Injection Pump Fuel Metering Control “A” Range/Performance (Cam/Rotor/Injector): Injection pump fuel metering control “A” performance issue.
P0253 Injection Pump Fuel Metering Control “A” Low (Cam/Rotor/Injector): Low voltage to injection pump fuel metering control “A”.
P0254 Injection Pump Fuel Metering Control “A” High (Cam/Rotor/Injector): High voltage to injection pump fuel metering control “A”.
P0255 Injection Pump Fuel Metering Control “A” Intermittent (Cam/Rotor/Injector): Intermittent signal from injection pump fuel metering control “A”.
P0256 Injection Pump Fuel Metering Control “B” (Cam/Rotor/Injector): Problem with injection pump fuel metering control “B”.
P0257 Injection Pump Fuel Metering Control “B” Range/Performance (Cam/Rotor/Injector): Injection pump fuel metering control “B” performance issue.
P0258 Injection Pump Fuel Metering Control “B” Low (Cam/Rotor/Injector): Low voltage to injection pump fuel metering control “B”.
P0259 Injection Pump Fuel Metering Control “B” High (Cam/Rotor/Injector): High voltage to injection pump fuel metering control “B”.
P0260 Injection Pump Fuel Metering Control “B” Intermittent (Cam/Rotor/Injector): Intermittent signal from injection pump fuel metering control “B”.
P0261 Cylinder 1 Injector Circuit Low: Low voltage in the injector circuit for cylinder 1.
P0262 Cylinder 1 Injector Circuit High: High voltage in the injector circuit for cylinder 1.
P0263 Cylinder 1 Contribution/Balance: Cylinder 1 contribution or balance issue.
P0264 Cylinder 2 Injector Circuit Low: Low voltage in the injector circuit for cylinder 2.
P0265 Cylinder 2 Injector Circuit High: High voltage in the injector circuit for cylinder 2.
P0266 Cylinder 2 Contribution/Balance: Cylinder 2 contribution or balance issue.
P0267 Cylinder 3 Injector Circuit Low: Low voltage in the injector circuit for cylinder 3.
P0268 Cylinder 3 Injector Circuit High: High voltage in the injector circuit for cylinder 3.
P0269 Cylinder 4 Contribution/Balance: Cylinder 4 contribution or balance issue.
P0270 Cylinder 4 Injector Circuit Low: Low voltage in the injector circuit for cylinder 4.
P0271 Cylinder 4 Injector Circuit High: High voltage in the injector circuit for cylinder 4.
P0272 Cylinder 4 Contribution/Balance: Cylinder 4 contribution or balance issue.
P0273 Cylinder 5 Injector Circuit Low: Low voltage in the injector circuit for cylinder 5.
P0274 Cylinder 5 Injector Circuit High: High voltage in the injector circuit for cylinder 5.
P0275 Cylinder 5 Contribution/Balance: Cylinder 5 contribution or balance issue.
P0276 Cylinder 6Injector Circuit Low: Low voltage in the injector circuit for cylinder 6.
P0277 Cylinder 6 Injector Circuit High: High voltage in the injector circuit for cylinder 6.
P0278 Cylinder 6 Contribution/Balance: Cylinder 6 contribution or balance issue.
P0279 Cylinder 7 Injector Circuit Low: Low voltage in the injector circuit for cylinder 7.
P0280 Cylinder 7 Injector Circuit High: High voltage in the injector circuit for cylinder 7.
P0281 Cylinder 7 Contribution/Balance: Cylinder 7 contribution or balance issue.
P0282 Cylinder 8 Injector Circuit Low: Low voltage in the injector circuit for cylinder 8.
P0283 Cylinder 8 Injector Circuit High: High voltage in the injector circuit for cylinder 8.
P0284 Cylinder 8 Contribution/Balance: Cylinder 8 contribution or balance issue.
P0285 Cylinder 9 Injector Circuit Low: Low voltage in the injector circuit for cylinder 9.
P0286 Cylinder 9 Injector Circuit High: High voltage in the injector circuit for cylinder 9.
P0287 Cylinder 9 Contribution/Balance: Cylinder 9 contribution or balance issue.
P0288 Cylinder 10 Injector Circuit Low: Low voltage in the injector circuit for cylinder 10.
P0289 Cylinder 10 Injector Circuit High: High voltage in the injector circuit for cylinder 10.
P0290 Cylinder 10 Contribution/Balance: Cylinder 10 contribution or balance issue.
P0291 Cylinder 11 Injector Circuit Low: Low voltage in the injector circuit for cylinder 11.
P0292 Cylinder 11 Injector Circuit High: High voltage in the injector circuit for cylinder 11.
P0293 Cylinder 11 Contribution/Balance: Cylinder 11 contribution or balance issue.
P0294 Cylinder 12 Injector Circuit Low: Low voltage in the injector circuit for cylinder 12.
P0295 Cylinder 12 Injector Circuit High: High voltage in the injector circuit for cylinder 12.
P0296 Cylinder 12 Contribution/Balance: Cylinder 12 contribution or balance issue.
P0298 Engine Oil Over Temperature: Engine oil temperature is too high.

P03XX Codes: Ignition System or Misfire

Misfire codes are common in older vehicles like the 2002 Ford Taurus. These codes can point to issues with spark plugs, ignition coils, or other ignition components.

P0300 Random/Multiple Cylinder Misfire Detected: Random misfire detected across multiple cylinders.
P0301 Cylinder 1 Misfire Detected: Misfire detected in cylinder 1.
P0302 Cylinder 2 Misfire Detected: Misfire detected in cylinder 2.
P0303 Cylinder 3 Misfire Detected: Misfire detected in cylinder 3.
P0304 Cylinder 4 Misfire Detected: Misfire detected in cylinder 4.
P0305 Cylinder 5 Misfire Detected: Misfire detected in cylinder 5.
P0306 Cylinder 6 Misfire Detected: Misfire detected in cylinder 6.
P0307 Cylinder 7 Misfire Detected: Misfire detected in cylinder 7.
P0308 Cylinder 8 Misfire Detected: Misfire detected in cylinder 8.
P0309 Cylinder 9 Misfire Detected: Misfire detected in cylinder 9.
P0310 Cylinder 10 Misfire Detected: Misfire detected in cylinder 10.
P0311 Cylinder 11 Misfire Detected: Misfire detected in cylinder 11.
P0312 Cylinder 12 Misfire Detected: Misfire detected in cylinder 12.
P0313 Misfire Detected with Low Fuel: Misfire detected when fuel level is low.
P0314 Single Cylinder Misfire (Cylinder not Specified): Misfire detected, but cylinder not identified.
P0320 Ignition/Distributor Engine Speed Input Circuit: Problem in the ignition or distributor engine speed input circuit.
P0321 Ignition/Distributor Engine Speed Input Circuit Range/Performance: Ignition/distributor engine speed input signal out of range.
P0322 Ignition/Distributor Engine Speed Input Circuit No Signal: No signal from the ignition/distributor engine speed input circuit.
P0323 Ignition/Distributor Engine Speed Input Circuit Intermittent: Intermittent signal from the ignition/distributor engine speed input circuit.
P0324 Knock Control System Error: Problem with the knock control system.
P0325 Knock Sensor 1 Circuit (Bank 1 or Single Sensor): Problem in the knock sensor 1 circuit.
P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor): Knock sensor 1 signal out of range.
P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor): Low voltage signal from knock sensor 1.
P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor): High voltage signal from knock sensor 1.
P0329 Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor): Intermittent signal from knock sensor 1.
P0330 Knock Sensor 2 Circuit (Bank 2): Problem in the knock sensor 2 circuit.
P0331 Knock Sensor 2 Circuit Range/Performance (Bank 2): Knock sensor 2 signal out of range.
P0332 Knock Sensor 2 Circuit Low Input (Bank 2): Low voltage signal from knock sensor 2.
P0333 Knock Sensor 2 Circuit High Input (Bank 2): High voltage signal from knock sensor 2.
P0334 Knock Sensor 2 Circuit Input Intermittent (Bank 2): Intermittent signal from knock sensor 2.
P0335 Crankshaft Position Sensor A Circuit: Problem in the crankshaft position sensor A circuit.
P0336 Crankshaft Position Sensor A Circuit Range/Performance: Crankshaft position sensor A signal out of range.
P0337 Crankshaft Position Sensor A Circuit Low Input: Low voltage signal from crankshaft position sensor A.
P0338 Crankshaft Position Sensor A Circuit High Input: High voltage signal from crankshaft position sensor A.
P0339 Crankshaft Position Sensor A Circuit Intermittent: Intermittent signal from crankshaft position sensor A.
P0340 Camshaft Position Sensor “A” Circuit (Bank 1 or Single Sensor): Problem in the camshaft position sensor “A” circuit.
P0341 Camshaft Position Sensor “A” Circuit Range/Performance (Bank 1 or Single Sensor): Camshaft position sensor “A” signal out of range.
P0342 Camshaft Position Sensor “A” Circuit Low Input (Bank 1 or Single Sensor): Low voltage signal from camshaft position sensor “A”.
P0343 Camshaft Position Sensor “A” Circuit High Input (Bank 1 or Single Sensor): High voltage signal from camshaft position sensor “A”.
P0344 Camshaft Position Sensor “A” Circuit Intermittent (Bank 1 or Single Sensor): Intermittent signal from camshaft position sensor “A”.
P0345 Camshaft Position Sensor “A” Circuit (Bank 2): Problem in the camshaft position sensor “A” circuit on bank 2.
P0346 Camshaft Position Sensor “A” Circuit Range/Performance (Bank 2): Camshaft position sensor “A” signal out of range on bank 2.
P0347 Camshaft Position Sensor “A” Circuit Low Input (Bank 2): Low voltage signal from camshaft position sensor “A” on bank 2.
P0348 Camshaft Position Sensor “A” Circuit High Input (Bank 2): High voltage signal from camshaft position sensor “A” on bank 2.
P0349 Camshaft Position Sensor “A” Circuit Intermittent (Bank 2): Intermittent signal from camshaft position sensor “A” on bank 2.
P0350 Ignition Coil Primary/Secondary Circuit: Problem in the ignition coil primary or secondary circuit.
P0351 Ignition Coil “A” Primary/Secondary Circuit: Problem in the ignition coil “A” primary or secondary circuit.
P0352 Ignition Coil “B” Primary/Secondary Circuit: Problem in the ignition coil “B” primary or secondary circuit.
P0353 Ignition Coil “C” Primary/Secondary Circuit: Problem in the ignition coil “C” primary or secondary circuit.
P0354 Ignition Coil “D” Primary/Secondary Circuit: Problem in the ignition coil “D” primary or secondary circuit.
P0355 Ignition Coil “E” Primary/Secondary Circuit: Problem in the ignition coil “E” primary or secondary circuit.
P0356 Ignition Coil “F” Primary/Secondary Circuit: Problem in the ignition coil “F” primary or secondary circuit.
P0357 Ignition Coil “G” Primary/Secondary Circuit: Problem in the ignition coil “G” primary or secondary circuit.
P0358 Ignition Coil “H” Primary/Secondary Circuit: Problem in the ignition coil “H” primary or secondary circuit.
P0359 Ignition Coil “I” Primary/Secondary Circuit: Problem in the ignition coil “I” primary or secondary circuit.
P0360 Ignition Coil “J” Primary/Secondary Circuit: Problem in the ignition coil “J” primary or secondary circuit.
P0361 Ignition Coil “K Primary/Secondary Circuit: Problem in the ignition coil “K” primary or secondary circuit.
P0362 Ignition Coil “L” Primary/Secondary Circuit: Problem in the ignition coil “L” primary or secondary circuit.
P0365 Camshaft Position Sensor “B” Circuit (Bank 1): Problem in the camshaft position sensor “B” circuit on bank 1.
P0366 Camshaft Position Sensor “B” Circuit Range/Performance (Bank 1): Camshaft position sensor “B” signal out of range on bank 1.
P0367 Camshaft Position Sensor “B” Circuit Low Input (Bank 1): Low voltage signal from camshaft position sensor “B” on bank 1.
P0368 Camshaft Position Sensor “B” Circuit High Input (Bank 1): High voltage signal from camshaft position sensor “B” on bank 1.
P0369 Camshaft Position Sensor “B” Circuit Intermittent (Bank 1): Intermittent signal from camshaft position sensor “B” on bank 1.
P0370 Timing Reference High Resolution Signal “A”: Problem with timing reference high resolution signal “A”.
P0371 Timing Reference High Resolution Signal “A” Too Many Pulses: Too many pulses in timing reference high resolution signal “A”.
P0372 Timing Reference High Resolution Signal “A” Too Few Pulses: Too few pulses in timing reference high resolution signal “A”.
P0373 Timing Reference High Resolution Signal “A” Intermittent/Erratic Pulses: Intermittent or erratic pulses in timing reference high resolution signal “A”.
P0374 Timing Reference High Resolution Signal “A” No Pulse: No pulse in timing reference high resolution signal “A”.
P0375 Timing Reference High Resolution Signal “B”: Problem with timing reference high resolution signal “B”.
P0376 Timing Reference High Resolution Signal “B” Too Many Pulses: Too many pulses in timing reference high resolution signal “B”.
P0377 Timing Reference High Resolution Signal “B” Too Few Pulses: Too few pulses in timing reference high resolution signal “B”.
P0378 Timing Reference High Resolution Signal “B” Intermittent/Erratic Pulses: Intermittent or erratic pulses in timing reference high resolution signal “B”.
P0379 Timing Reference High Resolution Signal “B” No Pulses: No pulse in timing reference high resolution signal “B”.
P0380 Glow Plug/Heater Circuit “A”: (Diesel engines only, not applicable to standard 2002 Ford Taurus gasoline engines). Problem in glow plug or heater circuit “A”.
P0381 Glow Plug/Heater Indicator Circuit: (Diesel engines only, not applicable to standard 2002 Ford Taurus gasoline engines). Problem in glow plug or heater indicator circuit.
P0382 Glow Plug/Heater Circuit “B”: (Diesel engines only, not applicable to standard 2002 Ford Taurus gasoline engines). Problem in glow plug or heater circuit “B”.
P0385 Crankshaft Position Sensor “B” Circuit: Problem in the crankshaft position sensor “B” circuit.
P0386 Crankshaft Position Sensor “B” Circuit Range/Performance: Crankshaft position sensor “B” signal out of range.
P0387 Crankshaft Position Sensor “B” Circuit Low Input: Low voltage signal from crankshaft position sensor “B”.
P0388 Crankshaft Position Sensor “B” Circuit High Input: High voltage signal from crankshaft position sensor “B”.
P0389 Crankshaft Position Sensor “B” Circuit Intermittent: Intermittent signal from crankshaft position sensor “B”.
P0390 Camshaft Position Sensor “B” Circuit: Problem in the camshaft position sensor “B” circuit.
P0391 Camshaft Position Sensor “B” circuit Range/Performance (Bank 2): Camshaft position sensor “B” signal out of range on bank 2.
P0392 Camshaft Position Sensor “B” Circuit Low Input (Bank 2): Low voltage signal from camshaft position sensor “B” on bank 2.
P0393 Camshaft Position Sensor “B” Circuit High Input (Bank 2): High voltage signal from camshaft position sensor “B” on bank 2.
P0394 Camshaft Position Sensor “B” Circuit Intermittent (Bank 2): Intermittent signal from camshaft position sensor “B” on bank 2.

P04XX Codes: Auxiliary Emission Controls

These codes often relate to components of your 2002 Ford Taurus’s emissions system, such as the EGR system, catalytic converter, or EVAP system.

P0400 Exhaust Gas Recirculation Flow: Problem with Exhaust Gas Recirculation (EGR) flow.
P0401 Exhaust Gas Recirculation Flow Insufficient Detected: Insufficient EGR flow detected.
P0402 Exhaust Gas Recirculation Flow Excessive Detected: Excessive EGR flow detected.
P0403 Exhaust Gas Recirculation Control Circuit: Problem in the EGR control circuit.
P0404 Exhaust Gas Recirculation Control Circuit Range/Performance: EGR control circuit performance issue.
P0405 Exhaust Gas Recirculation Sensor “A” Circuit Low: Low voltage signal from EGR sensor “A” circuit.
P0406 Exhaust Gas Recirculation Sensor “A” Circuit High: High voltage signal from EGR sensor “A” circuit.
P0407 Exhaust Gas Recirculation Sensor “B” Circuit Low: Low voltage signal from EGR sensor “B” circuit.
P0408 Exhaust Gas Recirculation Sensor “B” Circuit High: High voltage signal from EGR sensor “B” circuit.
P0409 Exhaust Gas Recirculation Sensor “A” Circuit: Problem in EGR sensor “A” circuit.
P0410 Secondary Air Injection System: Problem with the Secondary Air Injection (AIR) system.
P0411 Secondary Air Injection System Incorrect Flow Detected: Incorrect flow detected in the AIR system.
P0412 Secondary Air Injection System Switching Valve “A” Circuit: Problem in the AIR system switching valve “A” circuit.
P0413 Secondary Air Injection System Switching Valve “A” Circuit Open: Open circuit in the AIR system switching valve “A” circuit.
P0414 Secondary Air Injection System Switching Valve “A” Circuit Shorted: Short circuit in the AIR system switching valve “A” circuit.
P0415 Secondary Air Injection System Switching Valve “B” Circuit: Problem in the AIR system switching valve “B” circuit.
P0416 Secondary Air Injection System Switching Valve “B” Circuit Open: Open circuit in the AIR system switching valve “B” circuit.
P0417 Secondary Air Injection System Switching Valve “B” Circuit Shorted: Short circuit in the AIR system switching valve “B” circuit.
P0418 Secondary Air Injection System Relay “A” Circuit: Problem in the AIR system relay “A” circuit.
P0419 Secondary Air injection System Relay “B” Circuit: Problem in the AIR system relay “B” circuit.
P0420 Catalyst System Efficiency Below Threshold (Bank 1): Catalytic converter efficiency below threshold on bank 1.
P0421 Warm Up Catalyst Efficiency Below Threshold (Bank 1): Warm-up catalytic converter efficiency below threshold on bank 1.
P0422 Main Catalyst Efficiency Below Threshold (Bank 1): Main catalytic converter efficiency below threshold on bank 1.
P0423 Heated Catalyst Efficiency Below Threshold (Bank 1): Heated catalytic converter efficiency below threshold on bank 1.
P0424 Heated Catalyst Temperature Below Threshold (Bank 1): Heated catalytic converter temperature below threshold on bank 1.
P0425 Catalyst Temperature Sensor (Bank 1): Problem with the catalyst temperature sensor on bank 1.
P0426 Catalyst Temperature Sensor Range/Performance (Bank 1): Catalyst temperature sensor reading out of range on bank 1.
P0427 Catalyst Temperature Sensor Low Input (Bank 1): Low voltage signal from catalyst temperature sensor on bank 1.
P0428 Catalyst Temperature Sensor High Input (Bank 1): High voltage signal from catalyst temperature sensor on bank 1.
P0429 Catalyst Heater Control Circuit (Bank 1): Problem in the catalyst heater control circuit on bank 1.
P0430 Catalyst System Efficiency Below Threshold (Bank 2): Catalytic converter efficiency below threshold on bank 2.
P0431 Warm Up Catalyst Efficiency Below Threshold (Bank 2): Warm-up catalytic converter efficiency below threshold on bank 2.
P0432 Main Catalyst Efficiency Below Threshold (Bank 2): Main catalytic converter efficiency below threshold on bank 2.
P0433 Heated Catalyst Efficiency Below Threshold (Bank 2): Heated catalytic converter efficiency below threshold on bank 2.
P0434 Heated Catalyst Temperature Below Threshold (Bank 2): Heated catalytic converter temperature below threshold on bank 2.
P0435 Catalyst Temperature Sensor (Bank 2): Problem with the catalyst temperature sensor on bank 2.
P0436 Catalyst Temperature Sensor Range/Performance (Bank 2): Catalyst temperature sensor reading out of range on bank 2.
P0437 Catalyst Temperature Sensor Low Input (Bank 2): Low voltage signal from catalyst temperature sensor on bank 2.
P0438 Catalyst Temperature Sensor High Input (Bank 2): High voltage signal from catalyst temperature sensor on bank 2.
P0439 Catalyst Heater Control Circuit (Bank 2): Problem in the catalyst heater control circuit on bank 2.
P0440 Evaporative Emission Control System: Problem with the Evaporative Emission Control System (EVAP).
P0441 Evaporative Emission Control System Incorrect Purge Flow: Incorrect purge flow in the EVAP system.
P0442 Evaporative Emission Control System Leak Detected (small leak): Small leak detected in the EVAP system.
P0443 Evaporative Emission Control System Purge Control Valve Circuit: Problem in the EVAP purge control valve circuit.
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open: Open circuit in the EVAP purge control valve circuit.
P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted: Short circuit in the EVAP purge control valve circuit.
P0446 Evaporative Emission Control System Vent Control Circuit: Problem in the EVAP vent control circuit.
P0447 Evaporative Emission Control System Vent Control Circuit Open: Open circuit in the EVAP vent control circuit.
P0448 Evaporative Emission Control System Vent Control Circuit Shorted: Short circuit in the EVAP vent control circuit.
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit: Problem in the EVAP vent valve or solenoid circuit.
P0450 Evaporative Emission Control System Pressure Sensor: Problem with the EVAP pressure sensor.
P0451 Evaporative Emission Control System Pressure Sensor Range/Performance: EVAP pressure sensor reading out of range.
P0452 Evaporative Emission Control System Pressure Sensor Low Input: Low voltage signal from EVAP pressure sensor.
P0453 Evaporative Emission Control System Pressure Sensor High input: High voltage signal from EVAP pressure sensor.
P0454 Evaporative Emission Control System Pressure Sensor Intermittent: Intermittent signal from EVAP pressure sensor.
P0455 Evaporative Emission Control System Leak Detected (gross leak): Gross leak detected in the EVAP system.
P0456 Evaporative Emission Control System Leak Detected (very small leak): Very small leak detected in the EVAP system.
P0457 Evaporative Emission Control System Leak Detected (fuel cap loose/off): EVAP leak detected, possibly due to loose or missing fuel cap.
P0460 Fuel Level Sensor Circuit: Problem in the fuel level sensor circuit.
P0461 Fuel Level Sensor Circuit Range/Performance: Fuel level sensor reading out of range.
P0462 Fuel Level Sensor Circuit Low Input: Low voltage signal from fuel level sensor.
P0463 Fuel Level Sensor Circuit High Input: High voltage signal from fuel level sensor.
P0464 Fuel Level Sensor Circuit Intermittent: Intermittent signal from fuel level sensor.
P0465 EVAP Purge Flow Sensor Circuit: Problem in the EVAP purge flow sensor circuit.
P0466 EVAP Purge Flow Sensor Circuit Range/Performance: EVAP purge flow sensor reading out of range.
P0467 EVAP Purge Flow Sensor Circuit Low Input: Low voltage signal from EVAP purge flow sensor.
P0468 EVAP Purge Flow Sensor Circuit High Input: High voltage signal from EVAP purge flow sensor.
P0469 EVAP Purge Flow Sensor Circuit Intermittent: Intermittent signal from EVAP purge flow sensor.
P0470 Exhaust Pressure Sensor: Problem with the exhaust pressure sensor.
P0471 Exhaust Pressure Sensor Range/Performance: Exhaust pressure sensor reading out of range.
P0472 Exhaust Pressure Sensor Low: Low reading from the exhaust pressure sensor.
P0473 Exhaust Pressure Sensor High: High reading from the exhaust pressure sensor.
P0474 Exhaust Pressure Sensor Intermittent: Intermittent signal from exhaust pressure sensor.
P0475 Exhaust Pressure Control Valve: Problem with the exhaust pressure control valve.
P0476 Exhaust Pressure Control Valve Range/Performance: Exhaust pressure control valve performance issue.
P0477 Exhaust Pressure Control Valve Low: Low voltage to the exhaust pressure control valve.
P0478 Exhaust Pressure Control Valve High: High voltage to the exhaust pressure control valve.
P0479 Exhaust Pressure Control Valve Intermittent: Intermittent signal to the exhaust pressure control valve.
P0480 Cooling Fan 1 Control Circuit: Problem in cooling fan 1 control circuit.
P0481 Cooling Fan 2 Control Circuit: Problem in cooling fan 2 control circuit.
P0482 Cooling Fan 3 Control Circuit: Problem in cooling fan 3 control circuit.
P0483 Cooling Fan Rationality Check: Cooling fan rationality check failure.
P0484 Cooling Fan Circuit Over Current: Overcurrent in the cooling fan circuit.
P0485 Cooling Fan Power/Ground Circuit: Problem in cooling fan power or ground circuit.
P0486 Exhaust Gas Recirculation Sensor “B” Circuit: Problem in EGR sensor “B” circuit.
P0487 Exhaust Gas Recirculation Throttle Position Control Circuit: Problem in EGR throttle position control circuit.
P0488 Exhaust Gas Recirculation Throttle Position Control Range/Performance: EGR throttle position control performance issue.
P0491 Secondary Air Injection System (Bank 1): Problem with the AIR system on bank 1.
P0492 Secondary Air Injection System (Bank 2): Problem with the AIR system on bank 2.

P05XX Codes: Vehicle Speed, Idle Control, and Auxiliary Inputs

These codes can relate to vehicle speed sensors, idle control systems, and other auxiliary input systems that affect the drivability of your 2002 Ford Taurus.

P0500 Vehicle Speed Sensor: Problem with the Vehicle Speed Sensor (VSS).
P0501 Vehicle Speed Sensor Range/Performance: VSS signal out of range.
P0502 Vehicle Speed Sensor Circuit Low Input: Low voltage signal from the VSS circuit.
P0503 Vehicle Speed Sensor Intermittent/Erratic/High: Intermittent, erratic, or high signal from the VSS.
P0505 Idle Control System: Problem with the idle control system.
P0506 Idle Control System RPM Lower Than Expected: Idle RPM lower than expected.
P0507 Idle Control System RPM Higher Than Expected: Idle RPM higher than expected.
P0508 Idle Control System Circuit Low: Low voltage in the idle control system circuit.
P0509 Idle Control System Circuit High: High voltage in the idle control system circuit.
P0510 Closed Throttle Position Switch: Problem with the closed throttle position switch.
P0512 Starter Request Circuit: Problem in the starter request circuit.
P0513 Incorrect Immobilizer Key: (Immobilizer system may vary on a 2002 Ford Taurus depending on options). Incorrect immobilizer key detected.
P0515 Battery Temperature Sensor Circuit: Problem in the battery temperature sensor circuit.
P0516 Battery Temperature Sensor Circuit Low: Low voltage signal from the battery temperature sensor circuit.
P0517 Battery Temperature Sensor Circuit High: High voltage signal from the battery temperature sensor circuit.
P0520 Engine Oil Pressure Sensor/Switch Circuit: Problem in the engine oil pressure sensor or switch circuit.
P0521 Engine Oil Pressure Sensor/Switch Range/Performance: Engine oil pressure sensor or switch reading out of range.
P0522 Engine Oil Pressure Sensor/Switch Low Voltage: Low voltage signal from the engine oil pressure sensor or switch.
P0523 Engine Oil Pressure Sensor/Switch High Voltage: High voltage signal from the engine oil pressure sensor or switch.
P0524 Engine Oil Pressure Too Low: Engine oil pressure is too low.
P0530 A/C Refrigerant Pressure Sensor Circuit: Problem in the A/C refrigerant pressure sensor circuit.
P0531 A/C Refrigerant Pressure Sensor Circuit Range/Performance: A/C refrigerant pressure sensor reading out of range.
P0532 A/C Refrigerant Pressure Sensor Circuit Low Input: Low voltage signal from the A/C refrigerant pressure sensor circuit.
P0533 A/C Refrigerant Pressure Sensor Circuit High Input: High voltage signal from the A/C refrigerant pressure sensor circuit.
P0534 Air Conditioner Refrigerant Charge Loss: Air conditioner refrigerant charge loss detected.
P0540 Intake Air Heater Circuit: (Diesel engines or some cold-weather gasoline applications, may not be applicable to all 2002 Ford Taurus models). Problem in the intake air heater circuit.
P0541 Intake Air Heater Circuit Low: (Diesel engines or some cold-weather gasoline applications, may not be applicable to all 2002 Ford Taurus models). Low voltage in the intake air heater circuit.
P0542 Intake Air Heater Circuit High: (Diesel engines or some cold-weather gasoline applications, may not be applicable to all 2002 Ford Taurus models). High voltage in the intake air heater circuit.
P0544 Exhaust Gas Temperature Sensor Circuit (Bank 1): Problem in the exhaust gas temperature sensor circuit on bank 1.
P0545 Exhaust Gas Temperature Sensor Circuit Low (Bank 1): Low voltage signal from exhaust gas temperature sensor circuit on bank 1.
P0546 Exhaust Gas Temperature Sensor Circuit High (Bank 1): High voltage signal from exhaust gas temperature sensor circuit on bank 1.
P0547 Exhaust Gas Temperature Sensor Circuit (Bank 2): Problem in the exhaust gas temperature sensor circuit on bank 2.
P0548 Exhaust Gas Temperature Sensor Circuit Low (Bank 2): Low voltage signal from exhaust gas temperature sensor circuit on bank 2.
P0549 Exhaust Gas Temperature Sensor Circuit High (Bank 2): High voltage signal from exhaust gas temperature sensor circuit on bank 2.
P0550 Power Steering Pressure Sensor Circuit: Problem in the power steering pressure sensor circuit.
P0551 Power Steering Pressure Sensor Circuit Range/Performance: Power steering pressure sensor reading out of range.
P0552 Power Steering Pressure Sensor Circuit Low Input: Low voltage signal from the power steering pressure sensor circuit.
P0553 Power Steering Pressure Sensor Circuit High Input: High voltage signal from the power steering pressure sensor circuit.
P0554 Power Steering Pressure Sensor Circuit Intermittent: Intermittent signal from the power steering pressure sensor circuit.
P0560 System Voltage: Problem with system voltage.
P0561 System Voltage Unstable: Unstable system voltage.
P0562 System Voltage Low: Low system voltage.
P0563 System Voltage High: High system voltage.
P0564 Cruise Control Multi-Function Input Signal: Problem with cruise control multi-function input signal.
P0565 Cruise Control On Signal: Problem with cruise control “On” signal.
P0566 Cruise Control Off Signal: Problem with cruise control “Off” signal.
P0567 Cruise Control Resume Signal: Problem with cruise control “Resume” signal.
P0568 Cruise Control Set Signal: Problem with cruise control “Set” signal.
P0569 Cruise Control Coast Signal: Problem with cruise control “Coast” signal.
P0570 Cruise Control Accel Signal: Problem with cruise control “Accel” signal.
P0571 Cruise Control/Brake Switch A Circuit: Problem in cruise control or brake switch “A” circuit.
P0572 Cruise Control/Brake Switch A Circuit Low: Low voltage in cruise control or brake switch “A” circuit.
P0573 Cruise Control/Brake Switch A Circuit High: High voltage in cruise control or brake switch “A” circuit.
P0574 Cruise Control System – Vehicle Speed Too High: Vehicle speed too high for cruise control system.
P0575 Cruise Control Input Circuit: Problem in cruise control input circuit.
P0576 Cruise Control Input Circuit Low: Low voltage in cruise control input circuit.
P0577 Cruise Control input Circuit High: High voltage in cruise control input circuit.
P0578 through P0580 Reserved for Cruise Control Codes: Reserved for future cruise control codes.

P06XX Codes: Computer and Auxiliary Outputs

These codes often indicate problems with the vehicle’s computer (PCM or ECM) or auxiliary output circuits, which can be more complex to diagnose.

P0600 Serial Communication Link: Problem with the serial communication link.
P0601 Internal Control Module Memory Check Sum Error: Internal control module memory checksum error.
P0602 Control Module Programming Error: Control module programming error.
P0603 Internal Control Module Keep Alive Memory (KAM) Error: Internal control module Keep Alive Memory (KAM) error.
P0604 Internal Control Module Random Access Memory (RAM) Error: Internal control module Random Access Memory (RAM) error.
P0605 Internal Control Module Read Only Memory (ROM) Error: Internal control module Read Only Memory (ROM) error.
P0606 ECM/PCM Processor: Problem with the Engine Control Module (ECM) or Powertrain Control Module (PCM) processor.
P0607 Control Module Performance: Control module performance issue.
P0608 Control Module VSS Output “A”: Problem with control module Vehicle Speed Sensor (VSS) output “A”.
P0609 Control Module VSS Output “B”: Problem with control module Vehicle Speed Sensor (VSS) output “B”.
P0610 Control Module Vehicle Options Error: Control module vehicle options error.
P0615 Starter Relay Circuit: Problem in the starter relay circuit.
P0616 Starter Relay Circuit Low: Low voltage in the starter relay circuit.
P0617 Starter Relay Circuit High: High voltage in the starter relay circuit.
P0618 Alternative Fuel Control Module KAM Error: Alternative fuel control module KAM error.
P0619 Alternative Fuel Control Module RAM/ROM Error: Alternative fuel control module RAM or ROM error.
P0620 Generator Control Circuit: Problem in the generator (alternator) control circuit.
P0621 Generator Lamp “L” Terminal Control Circuit: Problem in the generator lamp “L” terminal control circuit.
P0622 Generator Field “F” Terminal Control Circuit: Problem in the generator field “F” terminal control circuit.
P0623 Generator Lamp Control Circuit: Problem in the generator lamp control circuit.
P0624 Fuel Cap Lamp Control Circuit: Problem in the fuel cap lamp control circuit.
P0630 VIN Not Programmed or Mismatch – ECM/PCM: Vehicle Identification Number (VIN) not programmed or mismatch in the ECM/PCM.
P0631 VIN Not Programmed or Mismatch – TCM: Vehicle Identification Number (VIN) not programmed or mismatch in the Transmission Control Module (TCM).
P0635 Power Steering Control Circuit: Problem in the power steering control circuit.
P0636 Power Steering Control Circuit Low: Low voltage in the power steering control circuit.
P0637 Power Steering Control Circuit High: High voltage in the power steering control circuit.
P0638 Throttle Actuator Control Range/Performance (Bank 1): Throttle actuator control range or performance issue on bank 1.
P0639 Throttle Actuator Control Range/Performance (Bank 2): Throttle actuator control range or performance issue on bank 2.
P0640 Intake Air Heater Control Circuit: Problem in the intake air heater control circuit.
P0645 A/C Clutch Relay Control Circuit: Problem in the A/C clutch relay control circuit.
P0646 A/C Clutch Relay Control Circuit Low: Low voltage in the A/C clutch relay control circuit.
P0647 A/C Clutch Relay Control Circuit High: High voltage in the A/C clutch relay control circuit.
P0648 Immobilizer Lamp Control Circuit: (Immobilizer system may vary on a 2002 Ford Taurus depending on options). Problem in the immobilizer lamp control circuit.
P0649 Speed Control Lamp Control Circuit: Problem in the speed control lamp control circuit.
P0650 Malfunction Indicator Lamp (MIL) Control Circuit: Problem in the Malfunction Indicator Lamp (MIL) control circuit (check engine light).
P0654 Engine RPM Output Circuit: Problem in the engine RPM output circuit.
P0655 Engine Hot Lamp Output Control Circuit: Problem in the engine hot lamp output control circuit.
P0656 Fuel Level Output Circuit: Problem in the fuel level output circuit.
P0660 Intake Manifold Tuning Valve Control Circuit (Bank 1): Problem in the intake manifold tuning valve control circuit on bank 1.
P0661 Intake Manifold Tuning Valve Control Circuit Low (Bank 1): Low voltage in the intake manifold tuning valve control circuit on bank 1.
P0662 Intake Manifold Tuning Valve Control Circuit High (Bank 1): High voltage in the intake manifold tuning valve control circuit on bank 1.
P0663 Intake Manifold Tuning Valve Control Circuit (Bank 2): Problem in the intake manifold tuning valve control circuit on bank 2.
P0664 Intake Manifold Tuning Valve Control Circuit Low (Bank 2): Low voltage in the intake manifold tuning valve control circuit on bank 2.
P0665 Intake Manifold Tuning Valve Control Circuit High (Bank 2): High voltage in the intake manifold tuning valve control circuit on bank 2.

P07XX and P08XX Codes: Transmission

Transmission codes (P07XX and P08XX) signal issues within your 2002 Ford Taurus’s automatic transmission system. These can range from sensor problems to mechanical failures.

P0700 Transmission Control System (MIL Request): Transmission Control System problem, requests Malfunction Indicator Lamp (MIL) to turn on.
P0701 Transmission Control System Range/Performance: Transmission Control System range or performance issue.
P0702 Transmission Control System Electrical: Electrical problem in the Transmission Control System.
P0703 Torque Converter/Brake Switch B Circuit: Problem in the torque converter or brake switch “B” circuit.
P0704 Clutch Switch Input Circuit Malfunction: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Malfunction in the clutch switch input circuit.
P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input): Problem in the Transmission Range Sensor circuit (PRNDL input – Park, Reverse, Neutral, Drive, Low).
P0706 Transmission Range Sensor Circuit Range/Performance: Transmission Range Sensor circuit range or performance issue.
P0707 Transmission Range Sensor Circuit Low Input: Low voltage signal from the Transmission Range Sensor circuit.
P0708 Transmission Range Sensor Circuit High Input: High voltage signal from the Transmission Range Sensor circuit.
P0709 Transmission Range Sensor Circuit intermittent: Intermittent signal from the Transmission Range Sensor circuit.
P0710 Transmission Fluid Temperature Sensor Circuit: Problem in the Transmission Fluid Temperature (TFT) sensor circuit.
P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance: TFT sensor circuit range or performance issue.
P0712 Transmission Fluid Temperature Sensor Circuit Low Input: Low voltage signal from the TFT sensor circuit.
P0713 Transmission Fluid Temperature Sensor Circuit High Input: High voltage signal from the TFT sensor circuit.
P0714 Transmission Fluid Temperature Sensor Circuit Intermittent: Intermittent signal from the TFT sensor circuit.
P0715 Input/Turbine Speed Sensor Circuit: Problem in the Input or Turbine Speed Sensor circuit.
P0716 Input/Turbine Speed Sensor Circuit Range/Performance: Input or Turbine Speed Sensor circuit range or performance issue.
P0717 Input/Turbine Speed Sensor Circuit No Signal: No signal from the Input or Turbine Speed Sensor circuit.
P0718 Input/Turbine Speed Sensor Circuit Intermittent: Intermittent signal from the Input or Turbine Speed Sensor circuit.
P0719 Torque Converter/Brake Switch B Circuit Low: Low voltage in the torque converter or brake switch “B” circuit.
P0720 Output Speed Sensor Circuit: Problem in the Output Speed Sensor circuit.
P0721 Output Speed Sensor Circuit Range/Performance: Output Speed Sensor circuit range or performance issue.
P0722 Output Speed Sensor Circuit No Signal: No signal from the Output Speed Sensor circuit.
P0723 Output Speed Sensor Circuit Intermittent: Intermittent signal from the Output Speed Sensor circuit.
P0724 Torque Converter/Brake Switch B Circuit High: High voltage in the torque converter or brake switch “B” circuit.
P0725 Engine Speed Input Circuit: Problem in the Engine Speed Input circuit (to TCM).
P0726 Engine Speed Input Circuit Range/Performance: Engine Speed Input circuit range or performance issue.
P0727 Engine Speed Input Circuit No Signal: No signal from the Engine Speed Input circuit.
P0728 Engine Speed Input Circuit Intermittent: Intermittent signal from the Engine Speed Input circuit.
P0730 Incorrect Gear Ratio: Incorrect gear ratio detected.
P0731 Gear 1 Incorrect Ratio: Incorrect gear ratio in 1st gear.
P0732 Gear 2 Incorrect Ratio: Incorrect gear ratio in 2nd gear.
P0733 Gear 3 Incorrect Ratio: Incorrect gear ratio in 3rd gear.
P0734 Gear 4 Incorrect Ratio: Incorrect gear ratio in 4th gear.
P0735 Gear 5 Incorrect Ratio: Incorrect gear ratio in 5th gear (if applicable).
P0736 Reverse Incorrect Ratio: Incorrect gear ratio in reverse.
P0737 TCM Engine Speed Output Circuit: Problem in the TCM Engine Speed Output circuit.
P0738 TCM Engine Speed Output Circuit Low: Low voltage in the TCM Engine Speed Output circuit.
P0739 TCM Engine Speed Output Circuit High: High voltage in the TCM Engine Speed Output circuit.
P0740 Torque Converter Clutch Circuit: Problem in the Torque Converter Clutch (TCC) circuit.
P0741 Torque Converter Clutch Circuit Performance or Stuck Off: TCC circuit performance issue or stuck off.
P0742 Torque Converter Clutch Circuit Stuck On: TCC circuit stuck on.
P0743 Torque Converter Clutch Circuit Electrical: Electrical problem in the TCC circuit.
P0744 Torque Converter Clutch Circuit Intermittent: Intermittent signal in the TCC circuit.
P0745 Pressure Control Solenoid “A”: Problem with Pressure Control Solenoid “A”.
P0746 Pressure Control Solenoid “A” Performance or Stuck Off: Pressure Control Solenoid “A” performance issue or stuck off.
P0747 Pressure Control Solenoid “A” Stuck On: Pressure Control Solenoid “A” stuck on.
P0748 Pressure Control Solenoid “A” Electrical: Electrical problem with Pressure Control Solenoid “A”.
P0749 Pressure Control Solenoid “A” Intermittent: Intermittent signal to Pressure Control Solenoid “A”.
P0750 Shift Solenoid “A”: Problem with Shift Solenoid “A”.
P0751 Shift Solenoid “A” Performance or Stuck Off: Shift Solenoid “A” performance issue or stuck off.
P0752 Shift Solenoid “A” Stuck On: Shift Solenoid “A” stuck on.
P0753 Shift Solenoid “A” Electrical: Electrical problem with Shift Solenoid “A”.
P0754 Shift Solenoid “A” Intermittent: Intermittent signal to Shift Solenoid “A”.
P0755 Shift Solenoid “B”: Problem with Shift Solenoid “B”.
P0756 Shift Solenoid “B” Performance or Stuck Off: Shift Solenoid “B” performance issue or stuck off.
P0757 Shift Solenoid “B” Stuck On: Shift Solenoid “B” stuck on.
P0758 Shift Solenoid “B” Electrical: Electrical problem with Shift Solenoid “B”.
P0759 Shift Solenoid “B” Intermittent: Intermittent signal to Shift Solenoid “B”.
P0760 Shift Solenoid “C”: Problem with Shift Solenoid “C”.
P0761 Shift Solenoid “C” Performance or Stuck Off: Shift Solenoid “C” performance issue or stuck off.
P0762 Shift Solenoid “C” Stuck On: Shift Solenoid “C” stuck on.
P0763 Shift Solenoid “C” Electrical: Electrical problem with Shift Solenoid “C”.
P0764 Shift Solenoid “C” Intermittent: Intermittent signal to Shift Solenoid “C”.
P0765 Shift Solenoid “D”: Problem with Shift Solenoid “D”.
P0766 Shift Solenoid “D” Performance or Stuck Off: Shift Solenoid “D” performance issue or stuck off.
P0767 Shift Solenoid “D” Stuck On: Shift Solenoid “D” stuck on.
P0768 Shift Solenoid “D” Electrical: Electrical problem with Shift Solenoid “D”.
P0769 Shift Solenoid “D” Intermittent: Intermittent signal to Shift Solenoid “D”.
P0770 Shift Solenoid “E”: Problem with Shift Solenoid “E”.
P0771 Shift Solenoid “E” Performance or Stuck Off: Shift Solenoid “E” performance issue or stuck off.
P0772 Shift Solenoid “E” Stuck On: Shift Solenoid “E” stuck on.
P0773 Shift Solenoid “E” Electrical: Electrical problem with Shift Solenoid “E”.
P0774 Shift Solenoid “E” Intermittent: Intermittent signal to Shift Solenoid “E”.
P0775 Pressure Control Solenoid “B”: Problem with Pressure Control Solenoid “B”.
P0776 Pressure Control Solenoid “B” Performance or Stuck Off: Pressure Control Solenoid “B” performance issue or stuck off.
P0777 Pressure Control Solenoid “B” Stuck On: Pressure Control Solenoid “B” stuck on.
P0778 Pressure Control Solenoid “B” Electrical: Electrical problem with Pressure Control Solenoid “B”.
P0779 Pressure Control Solenoid “B” Intermittent: Intermittent signal to Pressure Control Solenoid “B”.
P0780 Shift: Problem with gear shifting.
P0781 1-2 Shift: Problem with 1-2 gear shift.
P0782 2-3 Shift: Problem with 2-3 gear shift.
P0783 3-4 Shift: Problem with 3-4 gear shift.
P0784 4-5 Shift: Problem with 4-5 gear shift (if applicable).
P0785 Shift/Timing Solenoid: Problem with shift or timing solenoid.
P0786 Shift/Timing Solenoid Range/Performance: Shift or timing solenoid range or performance issue.
P0787 Shift/Timing Solenoid Low: Low voltage to shift or timing solenoid.
P0788 Shift/Timing Solenoid High: High voltage to shift or timing solenoid.
P0789 Shift/Timing Solenoid Intermittent: Intermittent signal to shift or timing solenoid.
P0790 Normal/Performance Switch Circuit: Problem in the Normal/Performance switch circuit (transmission mode switch).
P0791 Intermediate Shaft Speed Sensor Circuit: Problem in the Intermediate Shaft Speed Sensor circuit.
P0792 Intermediate Shaft Speed Sensor Circuit Range/Performance: Intermediate Shaft Speed Sensor circuit range or performance issue.
P0793 Intermediate Shaft Speed Sensor Circuit No Signal: No signal from the Intermediate Shaft Speed Sensor circuit.
P0794 Intermediate Shaft Speed Sensor Circuit Intermittent: Intermittent signal from the Intermediate Shaft Speed Sensor circuit.
P0795 Pressure Control Solenoid “C”: Problem with Pressure Control Solenoid “C”.
P0796 Pressure Control Solenoid “C” Performance or Stuck off: Pressure Control Solenoid “C” performance issue or stuck off.
P0797 Pressure Control Solenoid “C” Stuck On: Pressure Control Solenoid “C” stuck on.
P0798 Pressure Control Solenoid “C” Electrical: Electrical problem with Pressure Control Solenoid “C”.
P0799 Pressure Control Solenoid “C” Intermittent: Intermittent signal to Pressure Control Solenoid “C”.
P0801 Reverse Inhibit Control Circuit: Problem in the Reverse Inhibit Control Circuit.
P0803 1-4 Upshift (Skip Shift) Solenoid Control Circuit: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Problem in the 1-4 Upshift (Skip Shift) Solenoid Control Circuit.
P0804 1-4 Upshift (Skip Shift) Lamp Control Circuit: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Problem in the 1-4 Upshift (Skip Shift) Lamp Control Circuit.
P0805 Clutch Position Sensor Circuit: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Problem in the Clutch Position Sensor Circuit.
P0806 Clutch Position Sensor Circuit Range/Performance: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Clutch Position Sensor Circuit range or performance issue.
P0807 Clutch Position Sensor Circuit Low: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Low voltage in the Clutch Position Sensor Circuit.
P0808 Clutch Position Sensor Circuit High: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). High voltage in the Clutch Position Sensor Circuit.
P0809 Clutch Position Sensor Circuit Intermittent: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Intermittent signal from the Clutch Position Sensor Circuit.
P0810 Clutch Position Control Error: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Clutch Position Control Error.
P0811 Excessive Clutch Slippage: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Excessive Clutch Slippage.
P0812 Reverse Input Circuit: Problem in the Reverse Input Circuit.
P0813 Reverse Output Circuit: Problem in the Reverse Output Circuit.
P0814 Transmission Range Display Circuit: Problem in the Transmission Range Display Circuit.
P0815 Upshift Switch Circuit: (Manual transmissions or some specific automatic applications). Problem in the Upshift Switch Circuit.
P0816 Downshift Switch Circuit: (Manual transmissions or some specific automatic applications). Problem in the Downshift Switch Circuit.
P0817 Starter Disable Circuit: Problem in the Starter Disable Circuit.
P0818 Driveline Disconnect Switch Input Circuit: Problem in the Driveline Disconnect Switch Input Circuit (e.g., for 4WD disconnect).
P0820 Gear Lever X-Y Position Sensor Circuit: Problem in the Gear Lever X-Y Position Sensor Circuit (for manual or automated manual transmissions).
P0821 Gear Lever X Position Circuit: Problem in the Gear Lever X Position Circuit (for manual or automated manual transmissions).
P0822 Gear Lever Y Position Circuit: Problem in the Gear Lever Y Position Circuit (for manual or automated manual transmissions).
P0823 Gear Lever X Position Circuit Intermittent: Intermittent signal from the Gear Lever X Position Circuit.
P0824 Gear Lever Y Position Circuit Intermittent: Intermittent signal from the Gear Lever Y Position Circuit.
P0825 Gear Lever Push-Pull Switch (Shift Anticipate): Problem in the Gear Lever Push-Pull Switch (Shift Anticipate) circuit.
P0830 Clutch Pedal Switch “A” Circuit: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Problem in the Clutch Pedal Switch “A” Circuit.
P0831 Clutch Pedal Switch “A” Circuit Low: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Low voltage in the Clutch Pedal Switch “A” Circuit.
P0832 Clutch Pedal Switch “A” Circuit High: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). High voltage in the Clutch Pedal Switch “A” Circuit.
P0833 Clutch Pedal Switch “B” Circuit: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Problem in the Clutch Pedal Switch “B” Circuit.
P0834 Clutch Pedal Switch “B” Circuit Low: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). Low voltage in the Clutch Pedal Switch “B” Circuit.
P0835 Clutch Pedal Switch “B” Circuit High: (Manual transmissions, not applicable to standard 2002 Ford Taurus automatic transmissions). High voltage in the Clutch Pedal Switch “B” Circuit.
P0836 Four Wheel Drive (4WD) Switch Circuit: Problem in the Four Wheel Drive (4WD) Switch Circuit (if equipped).
P0837 Four Wheel Drive (4WD) Switch Circuit Range/Performance: Four Wheel Drive (4WD) Switch Circuit range or performance issue.
P0838 Four Wheel Drive (4WD) Switch Circuit Low: Low voltage in the Four Wheel Drive (4WD) Switch Circuit.
P0839 Four Wheel Drive (4WD) Switch Circuit High: High voltage in the Four Wheel Drive (4WD) Switch Circuit.
P0840 Transmission Fluid Pressure Sensor/Switch “A” Circuit: Problem in the Transmission Fluid Pressure Sensor or Switch “A” Circuit.
P0841 Transmission Fluid Pressure Sensor/Switch “A” Circuit Range/Performance: Transmission Fluid Pressure Sensor or Switch “A” Circuit range or performance issue.
P0842 Transmission Fluid Pressure Sensor/Switch “A” Circuit Low: Low voltage in the Transmission Fluid Pressure Sensor or Switch “A” Circuit.
P0843 Transmission Fluid Pressure Sensor/Switch “A” Circuit High: High voltage in the Transmission Fluid Pressure Sensor or Switch “A” Circuit.
P0844 Transmission Fluid Pressure Sensor/Switch “A” Circuit Intermittent: Intermittent signal from the Transmission Fluid Pressure Sensor or Switch “A” Circuit.
P0845 Transmission Fluid Pressure Sensor/Switch “B” Circuit: Problem in the Transmission Fluid Pressure Sensor or Switch “B” Circuit.
P0846 Transmission Fluid Pressure Sensor/Switch “B” Circuit Range/Performance: Transmission Fluid Pressure Sensor or Switch “B” Circuit range or performance issue.
P0847 Transmission Fluid Pressure Sensor/Switch “B” Circuit Low: Low voltage in the Transmission Fluid Pressure Sensor or Switch “B” Circuit.
P0848 Transmission Fluid Pressure Sensor/Switch “B” Circuit High: High voltage in the Transmission Fluid Pressure Sensor or Switch “B” Circuit.
P0849 Transmission Fluid Pressure Sensor/Switch “B” Circuit Intermittent: Intermittent signal from the Transmission Fluid Pressure Sensor or Switch “B” Circuit.

Beyond the Codes: Diagnosing Your 2002 Ford Taurus

While this list provides a comprehensive overview of OBD2 codes, remember that a code is just a starting point. For your 2002 Ford Taurus, a P0171 code (System too Lean, Bank 1), for instance, could be caused by a vacuum leak, a faulty MAF sensor, or even a clogged fuel filter. Proper diagnosis often requires further investigation, including:

Visual Inspection: Check for any obvious issues like loose gas caps, disconnected hoses, or damaged wiring.
Component Testing: Use a multimeter or other diagnostic tools to test sensors and actuators related to the code.
Professional Scan Tools: Mechanics often use advanced scan tools that can provide more detailed information and perform system tests beyond basic code reading.

Seeking Professional Help:

If you’re not comfortable diagnosing and repairing your 2002 Ford Taurus yourself, it’s always best to consult a qualified mechanic. They have the expertise, experience, and tools to accurately diagnose the problem and perform the necessary repairs. Websites like cardiagnosticnearme.com can help you locate reputable repair shops in your area.

Conclusion:

Understanding OBD2 codes is a valuable skill for any 2002 Ford Taurus owner. This guide provides a detailed reference to help you decipher those codes and take the first step toward resolving car trouble. By combining this knowledge with careful observation and, when needed, professional assistance, you can keep your 2002 Ford Taurus running reliably for years to come.