What to Do When the Engine Fault EPC Light Comes On?

[LaIsabela]

Car engine light comes on for the following reasons: 1. Sensor issues. Sensors include those for coolant temperature, crankshaft position, air flow, intake air temperature, oxygen sensors, etc. When a sensor is damaged, has poor contact, or experiences signal interruption, the car's ECU cannot accurately obtain engine data, which will cause the engine fault light to come on. 2. Maintenance issues. Poor engine maintenance is the most common cause of the engine fault light coming on. Vehicles have specific maintenance schedules, and if the owner does not adhere to these schedules, coupled with poor driving habits, it will increase the burden on the engine's operation. 3. Poor mixture combustion. Faulty spark plugs, ignition coils, fuel pumps, or clogged fuel lines can all lead to poor combustion of the engine's air-fuel mixture. Poor combustion results in engine carbon buildup or knocking issues, which are eventually detected by the engine's oxygen sensors and reported to the ECU, triggering the fault light as a warning.