Why is the idling engine fault light on?

The reason why the car vibrates at idle speed and the engine fault light is on is because the mixture of the car burns badly and the car will knock and shake. If the mixture of the car is too thin, the car will also have the phenomenon of weak acceleration.

The idle speed of the engine can be adjusted by adjusting the throttle. The idle speed of the engine is generally 550~800 rpm, which will lead to engine noise when there is a problem with the idle speed of the car.

When the engine releases the accelerator pedal during operation, the engine will be at idle speed, and it can run at idle speed only by overcoming its own resistance, so the fuel consumption is less.

Too high or too low idle speed will lead to automobile driving failure. Million car purchase subsidy