The engine fault light of Changhe Big Dipper is on, and the idle speed is shaking.

What you want to ask is the reason of idling jitter when the fault light of Changhe Big Dipper engine is on? The mixture burns badly. According to the query of Pacific Auto Network, the car's idle speed is shaking and the engine fault light is on because the car's mixture is not burning well. It is necessary to clean the throttle and replace the engine floor mat.