Reasons for the Car Engine Light to Illuminate?

[AlanAnn]

Reasons for the car engine light to illuminate are as follows: 1. Sensor issues Sensors include coolant temperature, crankshaft position, air flow, intake 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 illuminate. 2. Maintenance issues Poor engine maintenance is the most common cause of the engine fault light illuminating. Vehicles have specific maintenance cycles, and if the owner does not perform maintenance on schedule, combined with poor driving habits, it will increase the burden on the engine's operation. 3. Poor fuel mixture combustion Faults in the engine's spark plugs, ignition coils, fuel pump, or fuel line blockages can all lead to poor combustion of the engine's fuel mixture. Poor combustion of the fuel mixture results in engine carbon buildup or knocking issues, which are ultimately detected by the engine's oxygen sensors and reported to the ECU, causing the fault light to illuminate as a warning.