Sensor failure: Failures in the water temperature sensor, air flow sensor, intake temperature sensor, oxygen sensor, etc. cause the car ECU to be unable to accurately obtain the engine data, causing the fault light to turn on.
Fuel problem: Using poor quality fuel will cause incomplete combustion of the oil-gas mixture, causing the fault light to turn on.
Ignition system failure: Spark plug aging, ignition coil failure, etc. will affect the ignition effect, resulting in incomplete combustion, causing the fault light to turn on.
Mechanical parts wear: Cylinder gasket damage, poor valve sealing, camshaft failure, etc. will affect the engine’s combustion efficiency, causing the fault light to turn on.
Maintenance problem: Poor engine maintenance is the most common cause of engine faults.
Oil circuit problem: Fuel pump failure, oil circuit blockage, etc. will cause the engine to not get enough fuel, thus affecting normal operation.
Intake problem: Dirty air filter will reduce the amount of air entering the engine, affecting combustion efficiency, causing the fault light to turn on.
