Why does the engine malfunction indicator light sometimes come on?
1 Answers
The solutions for the engine malfunction indicator light sometimes coming on are: 1. Use high-quality gasoline; 2. Warm up the engine for one to two minutes when starting; 3. Read the fault codes to identify the cause of the malfunction and carry out repairs. The reasons why the engine malfunction indicator light sometimes comes on are: 1. Poor gasoline quality, leading to incomplete combustion of the air-fuel mixture; 2. Excessive spark plug carbon deposits, causing poor performance; 3. Faulty oxygen sensor or air flow sensor; 4. Engine knocking; 5. Damaged coolant temperature sensor; 6. Damaged high-pressure fuel pump, resulting in cylinder misfire. The methods to reset the engine malfunction indicator light are: 1. Disconnect the negative terminal of the engine battery, wait for 30 seconds, and then reconnect it; 2. Visit a 4S shop for inspection.