Several engine fault lights are on, mainly caused by these reasons!

The engine failure light is a problem that every car owner cannot ignore, which is directly related to engine life and driving safety. The engine fault light is usually due to the following reasons.

Poor quality gasoline

It is estimated that most car owners have this experience. Soon after the car is refueled, the engine fault light is on on the car dashboard; this is generally because poor quality gasoline is added at an irregular gas station, resulting in oil and gas when the engine is working. The mixture is not fully burned, and the engine malfunction light is on. This will not affect driving safety, but it will be more or less harmful to the engine.

Oxygen sensor failure

Today, there are two oxygen sensors installed on the car, one on the front and one on the front of the three-way catalytic converter. The function of the front oxygen sensor is to detect the air-fuel ratio of the engine under different working conditions, and the ECU computer adjusts the fuel injection amount and calculates the ignition time according to the signal. The main thing at the rear is to detect the working quality of the three-way catalytic converter! Therefore, if the oxygen sensor is damaged or the sensor plug is damaged or loose, it will cause the mixture to be too lean or too rich, which will cause the fault light to come on.