What is the reason why the Qi Jun engine fault light is on?

Qi Jun engine fault light may have the following reasons:

1, electronic throttle or engine has too much carbon deposit, which leads to idling jitter and dirty electronic throttle. This is because the oxygen sensor fails, which leads to the imbalance of the mixture ratio, and then causes the engine fault light to light up.

2. The thermostat is not normal. If the water temperature in the car body cannot be raised to the ideal temperature for a long time, the engine fault indicator light will light up.

3. In addition, the engine fault light may be related to the front and rear oxygen sensors, which need to be checked and maintained accordingly. If the fault is serious, it is recommended to go to the automobile 4S shop or repair shop, and professional technicians will check and repair the vehicle engine according to the fault code.