What Are the Reasons for the Vehicle's Engine Malfunction Light Staying On?

1 Answers
SanElliana
07/30/25 9:05am
The reasons for the vehicle's engine malfunction light staying on are: 1. Sensor damage, poor contact, or signal interruption; 2. Poor engine maintenance; 3. Poor quality of fuel and oil; 4. Incomplete combustion of the air-fuel mixture; 5. Spark plug or ignition coil failure; 6. Fuel pump failure or clogged fuel lines; 7. Clogged air filter. The solutions for the vehicle's engine malfunction 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.
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