That sudden beep and the appearance of a strange symbol on your car’s dashboard can be unsettling. Every driver has experienced that moment of confusion and concern, wondering what the new car alert sign means and if it signals serious trouble.
While some dashboard symbols are straightforward, others can be cryptic. Understanding these Car Alert Signs is crucial. They are your car’s way of communicating potential issues, from minor reminders to serious malfunctions that require immediate attention. Knowing what these warning lights indicate empowers you to take timely action, ensuring your safety and preventing costly repairs.
Understanding Car Dashboard Symbols
Not every light on your dashboard is a cause for panic. Many symbols are simply indicators of vehicle features in use, such as headlights, cruise control, or driver-assistance systems like lane departure warnings. These are generally informational and not warnings.
The color of a car alert sign is a critical clue to its urgency:
- Green or Blue Lights: These are typically informational lights. They indicate that a system is active and functioning correctly, such as your headlights being on or cruise control engaged. No immediate action is required for these lights.
- Yellow or Amber Lights: These are warning lights signaling that your car needs attention soon. They often indicate a less urgent issue or a system requiring servicing. It’s advisable to address these warnings promptly, but they usually don’t necessitate an immediate stop.
- Red Lights: Red car alert signs are serious warnings demanding immediate action. They often indicate a critical problem that could lead to vehicle damage or safety risks. If a red warning light appears, especially a mechanical one, it’s crucial to pull over safely as soon as possible to assess the situation. Ignoring red lights can lead to breakdowns or more severe damage.
Remember, dashboard lights often illuminate briefly when you start your car as part of a system check. This is normal, and as long as they disappear within a few seconds, it indicates that the systems are functioning correctly. However, if a light stays on or illuminates while driving, it’s signaling a condition that needs your attention.
To help you navigate the world of car alert signs, we’ve compiled a list of 18 common warning lights you might encounter. Keep in mind that while this guide covers many common symbols, specific symbols can vary slightly between car manufacturers and models. Always refer to your vehicle’s owner’s manual for the most accurate and detailed information about your car’s specific alert signs.
18 Common Car Alert Signs on Your Dashboard
1. Oil Pressure Warning Light 2. Tire Pressure Warning Light 3. Engine Temperature Warning Light 4. Traction Control Alert Light 5. Anti-lock Brake System (ABS) Warning Light 6. Traction Control Malfunction Light 7. Check Engine Light 8. Battery Alert Light 9. Low Fuel Indicator Light 10. Automatic Shift Lock Indicator Light 11. Seat Belt Reminder Light 12. Airbag Warning Light 13. Security Indicator Light 14. Fog Lamp Indicator Light 15. Washer Fluid Indicator Light 16. Brake System Warning Light 17. Lane Departure Warning Light 18. Transmission Temperature Warning Light
1. Oil Pressure Warning Light
Oil Pressure Warning Light
What It Means: This car alert sign, often depicted as an old-fashioned oil can, indicates a problem within your engine’s oil pressure system. It could mean your car is low on oil or that the oil pump isn’t effectively circulating oil to lubricate the engine’s internal parts. Some vehicles might display the word “OIL” instead of this symbol.
What To Do: Low oil pressure can lead to severe engine damage due to inadequate lubrication. This is a critical warning, so act promptly. Safely pull over to the side of the road and turn off your engine. Carefully check for any visible oil leaks around the engine area. Then, use the oil dipstick to check your engine oil level.
If the oil level is low, adding oil might resolve the issue and turn off the light. If the oil level is sufficient but the engine sounds unusually noisy, it could indicate an oil pump problem. If the oil level is fine and the engine sounds normal, the oil pressure sensor might be faulty. In any case, it’s essential to have your vehicle inspected by a qualified mechanic as soon as possible to diagnose and fix the underlying cause of the low oil pressure.
2. Tire Pressure Warning Light
What It Means: Also known as the Tire Pressure Monitoring System (TPMS) light, this car alert sign, resembling a horseshoe with an exclamation point, signals an issue with your tire pressure or the TPMS itself.
A solid TPMS light indicates that one or more of your tires have incorrect pressure – either too low or too high. A flashing TPMS light, especially if it flashes for about a minute or two when you start the car and then remains on, even if your tire pressures seem correct, points to a malfunction in the TPMS sensors.
What To Do: Driving with improper tire pressure is unsafe and can damage your tires, affecting handling and fuel efficiency. Stop as soon as it’s safe and check your tire pressures. Inflate or deflate your tires to the recommended pressure, which is usually found on a sticker inside your driver’s side doorjamb or in your owner’s manual.
If the light persists after adjusting tire pressures, or if it’s flashing, there might be an issue with the TPMS sensors. While a malfunctioning TPMS sensor won’t directly affect tire performance, it means the system won’t warn you of future pressure drops. It’s recommended to have your TPMS system checked by a tire service professional to diagnose any sensor issues and ensure the system is working correctly.
3. Engine Temperature Warning Light
Engine Temperature Warning Light
What It Means: This car alert sign, resembling a thermometer submerged in liquid, indicates that your engine is overheating. This is often related to the engine coolant (antifreeze) system, but can be caused by various factors affecting engine temperature regulation.
What To Do: Engine overheating can cause significant engine damage if ignored. When this light appears, first try turning off your car’s air conditioning and turning on the heater to maximum heat and fan speed. This can help draw heat away from the engine. If the light doesn’t turn off after a few minutes, safely pull over and turn off the engine immediately. Allow the engine to cool down for at least 15-20 minutes before attempting anything further. Do not open the hood while the engine is hot as this could release hot steam or coolant and cause burns.
While waiting for the engine to cool, plan your next steps. It’s a good time to call roadside assistance. They can advise you on whether it’s safe to add coolant (if you have some and know how to do it safely) or if towing to a repair shop is necessary. Driving an overheating engine can lead to serious and expensive damage.
4. Traction Control Light
What It Means: This car alert sign, often showing a car with wavy lines underneath, indicates that your vehicle’s traction control system is actively engaged. The traction control system uses the anti-lock braking system (ABS) to detect if a wheel is losing traction and spinning faster than others. When wheel slip is detected, the system applies braking force to the slipping wheel(s) and/or reduces engine power to help regain traction. This system is particularly helpful in slippery conditions like rain, snow, or ice.
What To Do: When this light is flashing, it means the traction control system is working as intended. Continue driving, but be aware that you are likely driving in conditions where traction is reduced. Adjust your driving accordingly – reduce speed, accelerate and brake gently, and avoid sudden maneuvers. If the light is constantly on and not flashing, it might indicate a malfunction in the traction control system, which should be checked by a mechanic.
5. Anti-lock Braking System (ABS) Warning Light
ABS Warning Light
What It Means: The ABS warning light, usually displaying the letters “ABS” inside a circle, indicates a problem with your vehicle’s Anti-lock Braking System. ABS is a crucial safety feature that prevents your wheels from locking up during hard braking, especially on slippery surfaces, allowing you to maintain steering control. When the ABS warning light is illuminated, it means the ABS system is not functioning correctly.
What To Do: Since ABS is a critical safety system, it’s important to address this warning promptly. While your regular brakes will still function, the anti-lock function may not be available in an emergency braking situation. It’s recommended to have a qualified mechanic diagnose and repair the ABS issue as soon as possible to ensure your vehicle’s safety systems are fully operational.
6. Traction Control Malfunction Light
What It Means: This car alert sign, often similar to the traction control light but sometimes with the word “OFF” or “!”, indicates a malfunction specifically within the traction control system. It suggests there might be a faulty sensor, damaged component, or another issue preventing the system from operating correctly. In some vehicles, the ABS and traction control systems are linked, so this light might also illuminate if there’s an ABS problem.
What To Do: While a traction control malfunction might not affect normal driving in ideal conditions, it means your vehicle might not have the intended level of stability and control in slippery or challenging driving situations. It’s advisable to have the system checked by a mechanic soon to ensure it’s functioning correctly, especially if you frequently drive in areas with inclement weather.
7. Check Engine Light
Check Engine Light
What It Means: The check engine light, often shaped like an engine outline or simply displaying “CHECK ENGINE,” is one of the most ambiguous car alert signs. It can be triggered by a wide range of issues, from minor to severe. A common minor cause is a loose or missing gas cap, which can cause fuel vapors to escape. However, it can also signal serious problems like low oil pressure or engine overheating.
What To Do: The appropriate action depends on the behavior of the check engine light. If the light is solid and steady, and you haven’t noticed any significant changes in your car’s performance, sounds, or smells, you can usually continue driving cautiously for a short distance, preferably to your home or a trusted mechanic.
However, if the check engine light is flashing or blinking, this indicates a more serious and potentially urgent issue that could cause significant engine damage if ignored. In this case, you should stop driving as soon as it is safe to do so.
Regardless of whether the light is solid or flashing, it’s crucial to have your car diagnosed by a qualified mechanic as soon as possible to determine the exact cause of the check engine light and get it repaired. Modern vehicles have complex computer systems, and a diagnostic scan is usually needed to pinpoint the problem accurately.
8. Battery Alert Light
What It Means: This car alert sign, shaped like a battery, indicates a problem with your vehicle’s charging system, not necessarily the battery itself. The issue could stem from a loose or corroded battery cable, a failing alternator (which charges the battery while the engine is running), or other electrical system faults. You might notice symptoms like dimming headlights, a fading clock display, or difficulty starting the car. In severe cases, the car might not start at all.
What To Do: A faulty charging system can leave you stranded if the battery completely discharges. It’s recommended to have your car’s charging system and battery inspected by a mechanic promptly. They can diagnose the root cause, whether it’s a battery issue, alternator problem, or wiring fault. If you need a new battery, consider a quality replacement to ensure reliable performance. Don’t delay getting this checked, as you might need a jump-start to get your car running again if the battery drains completely.
9. Low Fuel Indicator Light
Low Fuel Indicator Light
What It Means: This car alert sign, resembling a fuel pump, is a straightforward reminder that your vehicle is running low on fuel.
What To Do: When this light illuminates, it’s time to refuel soon. While most cars have a reserve fuel capacity when this light comes on, it’s not advisable to rely on it. Fuel levels can be affected by driving conditions, terrain, and unexpected traffic. Find the nearest gas station and fill up to avoid running out of fuel, which can be inconvenient and potentially damaging to some vehicles.
Bonus Tip: Most vehicles have a small arrow next to the fuel pump symbol on the fuel gauge. This arrow indicates which side of your car the fuel tank door is located, making refueling at the gas station more convenient.
10. Automatic Shift Lock Indicator Light
What It Means: This car alert sign, often showing a foot pressing a brake pedal and a gear shift symbol, indicates that the automatic shift lock mechanism is engaged. This system prevents you from shifting out of “Park” (P) or “Neutral” (N) unless the brake pedal is depressed. It’s a safety feature to prevent unintended vehicle movement.
What To Do: If you see this light and are trying to shift gears or start the ignition, it simply means you need to press firmly on the brake pedal. Once you engage the brake, you should be able to shift gears or start the engine as intended.
11. Seat Belt Reminder Light
Seat Belt Reminder Light
What It Means: This car alert sign, typically showing a person wearing a seatbelt, is a simple reminder for the driver and/or passengers to fasten their seatbelts. It’s often accompanied by an audible chime or beeping sound.
What To Do: Buckle up! Seatbelts are a primary safety feature in vehicles, significantly reducing the risk of serious injuries in accidents. Ensure that all occupants in the vehicle are wearing their seatbelts whenever the vehicle is in motion.
12. Airbag Warning Light
What It Means: The airbag warning light, usually displaying the word “AIRBAG” or a symbol of a person with an inflated airbag, indicates a problem within the vehicle’s airbag system. This could involve any part of the system, including the airbags themselves, sensors, or control module.
What To Do: The airbag system is a critical safety feature designed to protect occupants in the event of a collision. If the airbag warning light is illuminated, it means the system may not function correctly in an accident. It’s crucial to have your vehicle’s airbag system inspected and repaired by a qualified technician immediately to ensure your safety in case of a crash.
13. Security Indicator Light
Security Indicator Light
What It Means: The security indicator light, often a padlock symbol or a car key silhouette, relates to your vehicle’s anti-theft or security system. Its behavior can indicate different states:
- Blinking Light (when car is off): This is usually normal and indicates that the security system is armed and actively deterring theft.
- Solid Light and Car Won’t Start: This can mean the vehicle’s immobilizer system has been activated due to a perceived security threat or a system malfunction.
- Solid Light While Driving Normally: This is abnormal and indicates a malfunction in the security system that needs attention.
What To Do: If your vehicle is immobilized due to the security system, consult your owner’s manual for instructions on how to deactivate or reset the system. This might involve using a key code or specific procedure. If the security system seems to be malfunctioning (solid light while driving), it’s recommended to have it checked by a mechanic to ensure your vehicle’s security system functions correctly and doesn’t cause starting problems.
14. Fog Lamp Indicator Light
What It Means: This car alert sign, showing a headlight symbol with a wavy line through the beam, simply indicates that your fog lights are turned on.
What To Do: Fog lights are designed for use in conditions of reduced visibility, such as fog, heavy rain, or snow. Use them only when visibility is significantly impaired, typically less than 100 yards. Using fog lights unnecessarily in clear conditions can create glare for other drivers and may be against local traffic regulations. Remember to turn them off when visibility improves.
15. Washer Fluid Indicator Light
Washer Fluid Indicator Light
What It Means: This car alert sign, often depicted as a windshield with water spray, indicates that your windshield washer fluid level is low.
What To Do: Replenish your windshield washer fluid reservoir as soon as it’s convenient. Maintaining sufficient washer fluid is important for keeping your windshield clean and clear, especially in dirty or inclement weather conditions, ensuring good visibility.
16. Brake System Warning Light
What It Means: The brake system warning light can appear in a couple of forms: a circle with an exclamation point inside, or the word “BRAKE” in red. It can signal a few different issues with your braking system:
- Parking Brake Engaged: The most common reason is that the parking brake (emergency brake) is engaged.
- Low Brake Fluid: It can indicate low brake fluid level in the master cylinder.
- Brake System Malfunction: In more serious cases, it can signal a broader problem within the braking system.
What To Do: First, if this light comes on, safely pull over and check if your parking brake is engaged. If it is, disengage it completely. If the light remains on after releasing the parking brake, or if it wasn’t engaged in the first place, it could indicate a more serious brake system issue, such as low brake fluid or a malfunction. In such cases, it’s crucial to have your vehicle towed to a qualified repair shop for inspection. Driving with a brake system warning light on can be dangerous and should be avoided.
17. Lane Departure Warning Light
Lane Departure Warning Light
What It Means: The lane departure warning light, often showing lane markings with a car drifting out of lane, indicates that your vehicle is equipped with a lane departure warning system and that it has detected your vehicle drifting out of its lane. This system is a driver-assistance feature designed to help prevent unintentional lane departures.
What To Do: If this light illuminates, it’s a prompt to correct your steering and ensure your vehicle is within the lane markings. The system is designed to activate when it detects unintentional drifting. It might also activate momentarily if you intentionally change lanes without using your turn signal. Pay attention to your driving and make necessary steering corrections to stay safely within your lane.
18. Transmission Temperature Warning Light
What It Means: This car alert sign, often showing a thermometer inside a gear symbol, indicates that your vehicle’s transmission is overheating. This can be caused by various factors, including low transmission fluid, worn transmission components, heavy towing, or other issues stressing the transmission.
What To Do: Transmission overheating can lead to serious and costly damage to the transmission. If this light appears, safely pull over as soon as possible and turn off the engine to allow the transmission to cool down. Wait for a significant period before attempting to drive again. Check your owner’s manual for any specific recommendations. It’s best to have your vehicle inspected by a transmission specialist or qualified mechanic to diagnose the cause of the overheating and prevent further damage. If the light persists or reappears quickly, towing the vehicle to a repair shop is advisable.
Car Trouble?
Understanding car alert signs is the first step in addressing potential vehicle problems. If you encounter any of these warning lights and are unsure of the cause or the best course of action, it’s always wise to consult with a certified automotive technician. Prompt diagnosis and repair can prevent minor issues from escalating into major, expensive problems and ensure your vehicle remains safe and reliable. Schedule a diagnostic service with a trusted car repair professional to address any car alert signs that concern you and keep your vehicle running smoothly.
