What Causes the Engine Malfunction Indicator Light to Illuminate?
1 Answers
Engine malfunction indicator light illumination indicates a fault in the engine, which can be caused by: 1. Poor-quality gasoline or excessive engine carbon deposits leading to suboptimal combustion; 2. Failure of the engine's oxygen sensor; 3. Clogged fuel injectors or intake valves due to carbon buildup. During vehicle self-test when turning on the ignition, the engine fault light will illuminate, but it should turn off once the engine starts running. If this light remains on or flashes while driving, it signifies an engine issue requiring immediate inspection. Note that not all instances of engine light illumination prohibit driving - if there are no abnormal noises under the hood, no other warning messages on the dashboard, unaffected vehicle power, and normal transmission shifting, you may proceed to a 4S shop for further diagnosis.