What are the reasons for the engine malfunction indicator light to come on?
2 Answers
Reasons for the engine malfunction indicator light to come on: 1. Failure to perform regular maintenance, increasing the burden on engine operation; 2. Changes in the quality of lubricating oil during use, leading to oil deterioration; 3. Faults in the engine's spark plugs, ignition coils, fuel pump, or fuel line blockages. Steps to eliminate the engine malfunction indicator light: 1. Turn off the engine, then turn the ignition switch to the ON position; 2. Open the hood and the fuse box cover, locate the 30A fuel injection fuse according to the diagram on the fuse box cover, remove it, wait a few seconds, and then reinstall it; 3. Turn off the ignition switch, turn it back to the ON position, then start the car, and the malfunction indicator light will be eliminated.
I've been working in auto repair shops for many years. The most common issue causing the engine warning light to come on is faulty sensors, such as oxygen sensors or camshaft position sensors, which can affect the air-fuel mixture ratio and trigger the light. Another possibility is ignition system problems, like worn spark plugs or faulty ignition coils - if the fuel doesn't ignite properly, the light will activate. Sometimes clogged fuel injectors or exhaust system issues like a blocked catalytic converter can also set it off. The smartest move is to take it to a professional shop immediately to read the trouble codes with a diagnostic scanner. Don't ignore it - fuel consumption will increase and engine damage may occur. Early repairs save money and ensure safety.
