What Causes the Engine Fault Light to Illuminate and Then Turn Off?

1 Answers
VonBrayden
07/29/25 11:29pm
The reason the engine fault light illuminates and then turns off is: excessive carbon deposits in the throttle or engine internals, causing an imbalance in the air-fuel mixture ratio, which triggers the engine fault light. If the fault does not recur within several work cycles, the light will turn off. Solutions for the engine fault light illuminating and then turning off: 1. Replace the oxygen sensor; 2. Replace the catalytic converter; 3. Tighten or replace the fuel tank cap; 4. Replace the thermostat; 5. Replace the ignition coil; 6. Replace the mass airflow sensor; 7. Perform regular maintenance according to the vehicle's maintenance schedule.
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