What is the situation when the vehicle engine fault light is on?

The engine warning light comes on for the following reasons:

1. Sensor problem: Sensors include water temperature, crankshaft position, air flow, intake air temperature, oxygen sensor, etc. When these sensors are damaged, the contact is poor or the signal is interrupted, the ECU of the automobile can't get the engine data accurately, which will lead to the engine fault light coming on.

2, maintenance problems: poor engine maintenance is the most common cause of engine failure. Vehicles have a certain maintenance cycle. If the vehicle is not maintained on time, it will increase the burden of engine operation.

3. Oil quality: Oil quality includes fuel oil and engine oil. Generally, the fuel filled in cars is labeled, and the engine oil is also divided into semi-synthetic and fully synthetic. Manufacturers generally recommend which brand of fuel and oil car owners use. If the owner does not add it as required, it will cause the engine to wear for a long time, which will lead to the engine alarm light.