What does it mean when the engine malfunction indicator light is on?
2 Answers
The reasons for the engine malfunction indicator light being on are: 1. Sensor damage, poor contact, or signal interruption; 2. Poor engine maintenance; 3. Poor quality of fuel and engine oil; 4. Incomplete combustion of the air-fuel mixture; 5. Faulty spark plugs or ignition coils; 6. Fuel pump failure or clogged fuel lines; 7. Clogged air conditioning filter. The solutions for the engine malfunction indicator light being on are: 1. Use fuel additives to clean the entire fuel system; 2. After cleaning the engine, use higher-grade gasoline; 3. Use high-quality fuel additives to improve the cleanliness level of the fuel; 4. Replace the catalytic converter.
Don't underestimate the engine warning light—I've encountered it several times over my years of driving. The most common cause is faulty sensors, like aging oxygen sensors in the emissions system sending incorrect signals that make the computer think there's an engine issue. Or it could be clogged fuel lines or a struggling fuel pump. Another possibility is failed emissions control components, such as the catalytic converter. If the light comes on accompanied by engine shaking or sluggish acceleration, pull over immediately for safety checks. I advise against continuing to drive—visit a trusted repair shop to scan for trouble codes. Ignoring it can lead to drastically increased fuel consumption or even damage to critical engine components, resulting in costlier and more complicated repairs. Routine checks like ensuring the fuel cap is tight and regular maintenance can help prevent such issues.
