How to Solve the Problem of the Engine Malfunction Light Staying On?

[CooperLynn]

If the engine malfunction light is on, you can follow these steps to address the issue: First, check whether the engine is running normally and whether there are issues such as shaking or emitting black smoke. If these symptoms are present, avoid restarting the engine. It is especially important not to restart the engine if the red light is on. If the engine can be started, turn it off and wait for 5-10 minutes. Without pressing the brake, press the start button once or turn the car key halfway to the 'on' position without depressing the clutch. The car will perform a self-diagnostic check after powering on. Wait for 5-10 seconds and observe whether the malfunction light on the dashboard turns off. If the malfunction light does not turn off, visit a service station as soon as possible to identify the cause. The service station can use a portable diagnostic tool to read the fault code, obtain fault information, and perform targeted repairs. The engine malfunction light resembles a faucet icon and comes in two colors: yellow and red. A yellow light indicates a warning, while a red light indicates a prohibition. When the yellow malfunction light is on, it means some system parameters of the car may be beyond the set range. The car can still be driven, but some functions may be restricted. When the red malfunction light is on, the car must be stopped immediately, the engine turned off, and driving prohibited until the fault is checked. Common causes of the engine malfunction light turning on include: sensor failure, oil quality issues, poor combustion of the air-fuel mixture, turbocharging problems, intake issues, exhaust problems, or anti-theft system failure.

[VonMary]

The first time I saw the engine warning light stay on, I almost thought the car was totaled. But experience later taught me that it's often a minor issue. For example, the fuel cap might not be tightened properly—just check and tighten it. If it's another problem, I usually check if the battery connection is loose or if a sensor has malfunctioned. Never ignore it, as it could affect fuel efficiency or engine performance. I recommend using an OBD scanner to read the trouble codes. If it's an oxygen sensor or emission system issue, take it to a repair shop as soon as possible. Don't delay too long—my old car once cost me a fortune due to procrastination. Regular maintenance, like cleaning sensors, can prevent many troubles.

[LaHeidi]

As a car enthusiast, I usually start by doing it myself. Buy a small tool to read OBD trouble codes and identify whether it's a MAF sensor or ignition issue. Common problems include catalytic converter failure or aging small parts. Cleaning the sensor connector sometimes helps, but be careful not to mess up the circuit. If you don't understand mechanics, have a professional check it. I've found that ignoring this light can lead to engine overheating or even more expensive repairs, so acting promptly saves costs. By the way, regularly changing the air filter can reduce the failure rate.

[OLucille]

The engine light always makes me nervous, especially when driving my kids to school. I first pull over to check for oil leaks or unusual noises, then test if the fuel cap is properly closed. If it stays on, I don't risk driving long distances and contact maintenance immediately. Common causes like fuel system blockages or sensor failures require professional diagnostics. Safety comes first—don't wait until the car breaks down. I always remind technicians to inspect related components during routine maintenance.