07 Jeep Commander OBD2 Codes: Your Guide to Understanding and Troubleshooting

Navigating the complexities of your 2007 Jeep Commander requires understanding its onboard diagnostics system. OBD2 (On-Board Diagnostics II) codes are your Jeep’s way of communicating potential issues, and deciphering these codes is the first step towards effective troubleshooting. This guide provides a comprehensive overview of OBD2 codes relevant to the 2007 Jeep Commander, helping you understand what they mean and how to address them.

Understanding OBD2 Systems in Your 2007 Jeep Commander

The OBD2 system is a standardized system in modern vehicles that monitors various components and systems, from the engine and transmission to emissions control. When the system detects a problem, it generates a Diagnostic Trouble Code (DTC), often referred to as an OBD2 code. These codes are alphanumeric and follow a specific format. For your 2007 Jeep Commander, accessing and interpreting these codes is crucial for maintaining optimal performance and addressing potential problems promptly. Using an OBD2 scanner, you can retrieve these codes and begin the diagnostic process.

Common 07 Jeep Commander Obd2 Codes and Their Meanings

While a generic OBD2 scanner will display the code, understanding the specific context for your 2007 Jeep Commander is vital. Below is an expanded list of OBD2 codes that may be relevant to your vehicle, offering insights into potential issues. This is not an exhaustive list, but it covers many common codes that a 2007 Jeep Commander might encounter.

• P1192 Inlet Air Temp. Circuit Low & P1193 Inlet Air Temp. Circuit High: These codes indicate issues with the Inlet Air Temperature sensor circuit. A “Low” code suggests a short circuit or low voltage, while a “High” code indicates an open circuit or high voltage. This sensor is crucial for the engine control unit (ECU) to properly adjust fuel mixture based on air temperature. Problems can lead to poor fuel economy and engine performance.
• P1195, P1196, P1197 O2 Sensor Slow During Catalyst Monitor (Bank 1/Sensor 1, Bank 2/Sensor 1, Bank 1/Sensor 2): These codes pertain to the oxygen sensors and their performance during the catalytic converter monitoring process. “Slow response” suggests the sensor is not reacting quickly enough to changes in exhaust gas composition, which can indicate a failing sensor or issues with the catalytic converter itself. Oxygen sensors are vital for emissions control and fuel efficiency.
• P1198 Radiator Temperature Sensor Volts Too High & P1199 Radiator Temperature Sensor Volts Too Low: These codes signal problems with the radiator temperature sensor circuit. Similar to the air temperature sensor codes, “Too High” and “Too Low” indicate voltage issues in the sensor circuit. This sensor provides critical data to the ECU for engine cooling management, and malfunctions can lead to overheating or inefficient cooling.
• P1281 Engine Is Cold Too Long: This code suggests that the engine is taking longer than expected to reach its operating temperature. This could be related to a faulty thermostat, coolant temperature sensor, or issues within the cooling system. An engine running too cold can reduce fuel efficiency and increase emissions.
• P1282 Fuel Pump Relay Control Circuit: This code points to a problem in the fuel pump relay control circuit. This relay is responsible for providing power to the fuel pump. Issues here could be due to a faulty relay, wiring problems, or ECU malfunctions, and can lead to fuel delivery problems and engine starting issues.
• P1284 Fuel Injection Pump Battery Voltage Out Of Range & P1287 Fuel Injection Pump Controller Supply Voltage Low: These codes are related to the fuel injection pump and its voltage supply. “Out of Range” and “Low Voltage” suggest problems with the electrical supply to the fuel pump or its controller. Proper voltage is essential for the fuel pump to operate correctly and deliver fuel to the engine.
• P1288 Intake Manifold Short Runner Solenoid Circuit & P1289 Manifold Tune Valve Solenoid Circuit: These codes relate to the intake manifold runner control system. This system optimizes engine performance by adjusting the intake manifold runner length. Solenoid circuit issues can affect this system’s ability to function, potentially impacting engine power and efficiency.
• P1290 CNG Fuel Pressure Too High & P1292 CNG Pressure Sensor Voltage Too High & P1293 CNG Pressure Sensor Voltage Too Low: These codes are specific to Compressed Natural Gas (CNG) fuel systems, which might not be applicable to all 2007 Jeep Commanders unless specifically equipped. They indicate pressure or sensor voltage issues within the CNG fuel system.
• P1294 Target Idle Not Reached: This code indicates that the engine idle speed is not reaching the desired target. This could be due to various factors, including vacuum leaks, issues with the idle air control (IAC) valve, or engine mechanical problems. Incorrect idle speed can lead to stalling or rough idling.
• P1295 No 5 Volts To TP Sensor & P1296 No 5 Volts To MAP Sensor & P1403 No 5 Volts To EGR Sensor: These “No 5 Volts” codes are significant. They indicate a lack of a 5-volt reference signal to the Throttle Position (TP) sensor, Manifold Absolute Pressure (MAP) sensor, and EGR (Exhaust Gas Recirculation) sensor respectively. These sensors rely on this 5V reference voltage to function. A missing 5V supply often points to a problem within the ECU or a wiring harness issue affecting multiple sensors.
• P1297 No Change in MAP From Start To Run: This code suggests that the MAP sensor reading is not changing as expected when the engine starts. This could indicate a faulty MAP sensor, a vacuum leak affecting the MAP sensor reading, or wiring problems.
• P1298 Lean Operation At Wide Open Throttle: This code indicates that the engine is running lean (too much air, not enough fuel) when the throttle is wide open. This could be due to fuel delivery problems, vacuum leaks, or issues with the fuel injection system. Lean conditions can cause engine damage if prolonged.
• P1299 Vacuum Leak Found (IAC Fully Seated): This code confirms a vacuum leak in the system, even when the Idle Air Control (IAC) valve is fully closed. Vacuum leaks can disrupt engine operation, leading to poor idle, performance issues, and lean running conditions.
• P1388 Auto Shutdown (ASD) Relay Control Circuit & P1389 No Auto Shutdown (ASD) Relay Output Voltage At PCM: The Auto Shutdown (ASD) relay is a critical safety component that cuts power to the fuel pump and ignition system in case of an accident or engine stall. These codes indicate problems within the ASD relay control circuit or a lack of output voltage, potentially affecting engine shutdown safety features.
• P1390 Timing Belt Skipped One Tooth or More: This is a serious code indicating that the timing belt (or chain in some engines, though less likely to “skip”) has jumped teeth. This can lead to significant engine damage due to valves and pistons colliding. Immediate attention is required if this code appears.
• P1391 Intermittent Loss of CMP or CKP: This code points to intermittent signal loss from either the Camshaft Position (CMP) sensor or the Crankshaft Position (CKP) sensor. These sensors are vital for engine timing and ignition. Intermittent signal loss can cause engine misfires, stalling, or no-start conditions.
• P1399 Wait To Start Lamp Circuit: This code is relevant to diesel engines (less common in 2007 Jeep Commanders in North America, but possible in other markets). It indicates a problem with the “Wait to Start” lamp circuit, which is related to the glow plug system in diesel engines used for cold starting.
• P1475 Aux. 5 Volt Output Too High & P1488 Auxiliary 5 Volt Supply Output Too Low & P1496 5 Volt Supply Output Too Low: Similar to the “No 5 Volts” codes, these indicate issues with the 5-volt reference voltage supply, but specifically indicating “Too High” or “Too Low” voltage levels. These can affect multiple sensors that rely on this voltage.
• P1476 Too Little Secondary Air & P1477 Too Much Secondary Air: These codes relate to the secondary air injection system, which is used to reduce emissions during cold starts. “Too Little” or “Too Much” secondary air indicates problems within this system, potentially affecting emissions control.
• P1478 Battery Temp Sensor Volts Out of Limit & P1492 Battery Temperature Sensor Voltage Too High & P1493 Battery Temperature Sensor Voltage Too Low: These codes signal issues with the battery temperature sensor circuit. Battery temperature sensing is important for optimal charging system performance and battery management.
• P1479 Transmission Fan Relay Circuit & P1489 High Speed Fan CTRL Relay Circuit & P1490 Low Speed Fan CTRL Relay Circuit & P1491 Rad Fan Control Relay Circuit & P1498 High speed Rad Fan Ground CTRL Rly Circuit: These codes pertain to various fan control relay circuits, including transmission fan and radiator fan relays (both high and low speed). These relays control the cooling fans. Problems can lead to overheating of the engine or transmission.
• P1480 PCV Solenoid Valve: This code indicates a problem with the Positive Crankcase Ventilation (PCV) solenoid valve. The PCV system recirculates crankcase gases back into the intake manifold to reduce emissions. A faulty solenoid valve can affect PCV system operation.
• P1482 Catalyst Temperature Sensor Circuit Shorted Low & P1483 Catalyst Temperature Sensor Circuit Shorted High & P1484 Catalytic Converter Overheat Detected: These codes are related to the catalytic converter temperature sensor and overheating. Catalytic converter overheating can be a serious issue, potentially damaging the converter or indicating other engine problems causing excessive heat.
• P1485 Air Injection Solenoid Circuit: This code, similar to P1480, may relate to the secondary air injection system solenoid circuit, affecting emissions control.
• P1486 Evap Leak Monitor Pinched Hose & P1494 Leak Detection Pump Switch or Mechanical Fault & P1495 Leak Detection Pump Solenoid Circuit: These codes are related to the Evaporative Emission Control (EVAP) system leak detection. They indicate potential leaks, pinched hoses, or faults within the leak detection pump or its solenoid circuit. The EVAP system prevents fuel vapors from escaping into the atmosphere.
• P1487 Hi Speed Rad Fan CTRL Relay Circuit: This code is another one related to the radiator fan control, specifically the high-speed fan relay circuit.
• P1594 Charging System Voltage Too High & P1682 Charging System Voltage Too Low: These codes indicate problems with the vehicle’s charging system voltage. “Too High” voltage can damage electrical components, while “Too Low” voltage can lead to battery discharge and electrical system malfunctions.
• P1595 Speed Control Solenoid Circuits & P1596 Speed Control Switch Always High & P1597 Speed Control Switch Always Low & P1683 Speed Control Power Relay Or Speed Control 12 Volt Driver Circuit: These codes are related to the speed control (cruise control) system. They indicate problems within the solenoid circuits, switch issues (always high or low signal), or the power relay circuit of the cruise control system.
• P1598 A/C Pressure Sensor Volts Too High & P1599 A/C Pressure Sensor Volts Too Low: These codes indicate issues with the air conditioning (A/C) pressure sensor circuit. The A/C pressure sensor is important for the A/C system to operate correctly and safely.
• P1602 PCM Not Programmed: This code indicates that the Powertrain Control Module (PCM) or Engine Control Module (ECM) is not programmed. This can occur if the PCM/ECM has been replaced and not properly configured for the vehicle.
• P1680 Clutch Released Switch Circuit: This code is relevant to manual transmission vehicles (less common for 2007 Jeep Commander in the US, but possible). It indicates a problem with the clutch released switch circuit, which is used for various engine control functions during clutch operation.
• P1681 No I/P Cluster CCD/J1850 Messages Received & P1686 No SKIM Bus Message Received & P1687 No Cluster Bus Message & P1694 No CCD Messages Received From ECM & P1695 No CCD/J185O Message From BCM & P1698 No CCD Messages Received From PCM: These “No Message Received” codes point to communication problems within the vehicle’s data networks (CCD, J1850, SKIM bus, Cluster bus). These networks allow different modules (Instrument Panel Cluster, SKIM module, Body Control Module (BCM), PCM/ECM) to communicate. Communication failures can lead to various system malfunctions and diagnostic issues.
• P1684 Battery Disconnected Within Last 50 Starts: This code is informational and indicates that the battery has been disconnected within the last 50 engine start cycles. It’s often not a fault code, but rather a record of battery disconnection.
• P1685 Skim Invalid Key & P1686 No SKIM Bus Message Received: These codes relate to the Sentry Key Immobilizer Module (SKIM) system, which is an anti-theft system. “Invalid Key” suggests the key is not recognized by the system, and “No SKIM Bus Message” indicates a communication problem with the SKIM module.
• P1688 Internal Fuel Injection Pump Controller Failure & P1689 No Communication Between ECM & Injection Pump Module & P1690 Fuel injection pump CKP Sensor Does Not Agree With ECM CKP Sensor & P1691 Fuel Injection Pump Controller Calibration Failure: These codes are more complex and indicate problems within the fuel injection pump controller itself, communication issues between the engine control module (ECM) and the injection pump module, or calibration failures. They suggest deeper issues within the fuel injection system requiring expert diagnosis.
• P1693 DTC Detected In ECM Or PCM: This code is a general indicator that another Diagnostic Trouble Code (DTC) is stored in the ECM or PCM. It’s often used to signal that a more specific code is present.
• P1696 PCM Failure EEPROM Write Denied & P1697 PCM Failure SRI Mile Not Stored: These codes suggest internal failures within the PCM related to its memory (EEPROM) or its ability to store Service Reminder Indicator (SRI) mileage. These codes typically indicate a faulty PCM requiring replacement or reprogramming.
• P1719 Skip Shift Solenoid Circuit & P1740 TCC Or OD Solenoid Performance & P1756 Governor Pressure Not Equal To Target At 15–20 PSI & P1757 Governor Pressure Above 3 PSI When Request Is 0 PSI & P1762 Governor Pressure Sensor Offset Improper Voltage & P1763 Governor Pressure Sensor Voltage Too High & P1764 Governor Pressure Sensor Voltage Too Low & P1765 Trans 12 Volt Supply Relay Control Circuit & P1899 Park/Neutral Position Switch Stuck In Park or In Gear: These codes are related to the automatic transmission system. They cover a range of issues from solenoid circuit problems (skip shift, torque converter clutch – TCC, overdrive – OD), governor pressure sensor issues, to transmission relay control circuits and park/neutral switch problems. Transmission-related codes often require specialized diagnostic tools and expertise.

Alt text: A mechanic uses an OBD2 scanner to diagnose a 2007 Jeep Commander, highlighting the diagnostic port location.

Troubleshooting 07 Jeep Commander OBD2 Codes

When you encounter an OBD2 code on your 2007 Jeep Commander, the first step is to accurately record the code. Using a reliable OBD2 scanner is essential for this. Once you have the code, consult a resource like this guide or a dedicated repair manual to understand its potential meaning.

Important Considerations:

• Code Specificity: While this guide provides general explanations, the exact cause of a code can vary depending on the specific systems and conditions of your 2007 Jeep Commander.
• Professional Diagnosis: For complex codes or if you are not comfortable with automotive repair, it’s always recommended to consult a qualified mechanic. Attempting repairs without proper knowledge can sometimes worsen the problem.
• Systematic Approach: Troubleshooting should be systematic. Start by understanding the code, then inspect the related components, wiring, and sensors. Use diagnostic tools as needed.
• Clear Codes Carefully: After repairs, clear the OBD2 codes using your scanner. However, be sure to address the underlying issue; simply clearing the code without fixing the problem will only result in it returning.

Conclusion

OBD2 codes are invaluable tools for maintaining your 2007 Jeep Commander. Understanding these codes can empower you to address minor issues yourself and to communicate effectively with automotive professionals when more complex problems arise. By using this guide and taking a proactive approach to vehicle diagnostics, you can ensure your Jeep Commander remains reliable and performs optimally for years to come. Remember, when in doubt, seeking professional diagnostic services is always the safest and most effective course of action.