What Causes the Vehicle's Engine Malfunction Light to Illuminate?
4 Answers
Reasons for the vehicle's engine malfunction light to illuminate: 1. Poor combustion state; 2. Engine knocking; 3. Poor fuel quality; 4. Dirty engine cylinder interior with accumulated carbon deposits; 5. The computer cannot obtain engine data. Solutions for the engine malfunction light: 1. Clean the engine. Once the engine malfunction light comes on, the owner should promptly clean the engine; 2. Improve fuel quality, such as using good fuel additives to enhance the fuel's cleanliness level; 3. Use higher-grade gasoline. After engine cleaning, to maintain the engine's good working condition, the owner can choose to use 95 or 97 octane gasoline, which usually resolves the issue of the engine malfunction light illuminating.
Last time I was driving, the engine malfunction light suddenly came on, which gave me a scare. Possible causes include a damaged oxygen sensor in the exhaust system, where the sensor detects issues with exhaust emissions. If left unaddressed, the car may experience power loss and a significant increase in fuel consumption. Another common issue is aging spark plugs, which can fail to ignite properly and cause engine shaking. Clogged fuel injectors can also lead to abnormal air-fuel mixture. More seriously, the computer system may generate fault codes, such as control unit errors. A friend of mine delayed repairs, and later the catalytic converter was ruined, costing several times more to fix. In short, as soon as you see the light come on, don't hesitate—head to a 4S shop or professional repair center to scan with an OBD device as soon as possible. Early repairs mean early peace of mind, avoiding a breakdown on the road.
The engine warning light indicates that the engine control system has detected an abnormality, which should not be taken lightly. Based on my experience, possible causes include: fuel pump issues leading to insufficient fuel supply, worn spark plugs causing ignition failure, or faulty exhaust sensors affecting air-fuel ratio calculations. Short circuits or poor contact in wiring may also trigger false alarms. Other scenarios could be a clogged air filter restricting airflow, or more complex issues like turbocharger malfunctions. It's advisable to start with simple checks, such as smelling the exhaust for gasoline odor. Avoid disassembling components yourself due to high risks—safety comes first. The most accurate approach is to visit a maintenance shop for a diagnostic scan tool reading. Most minor issues can be resolved by replacing the faulty parts.
The engine malfunction light can illuminate for various reasons. Based on my years of driving experience, exhaust sensor errors are the most common cause, followed by ignition coil failures that cause engine shaking. Fuel impurities clogging the injectors or fuel pump issues can also trigger it. When the engine control module malfunctions, the light stays on without flashing. Don't panic when you see the light - first check if the vehicle is driving normally. If there are no abnormal noises, drive gently to a repair shop. Neglecting repairs can damage the catalytic converter or oxygen sensors, leading to higher costs. Regular maintenance with high-quality engine oil helps prevent issues.
