Why can't the throttle code be cleared after washing the Great Wall m4?

There is no special restriction on the throttle. Generally, it will be cleared when the idle speed is unstable. It is related to the air environment of the car, the type of engine oil used, the interval between changing air filters and driving habits. Most people do not clean until the working conditions begin to deteriorate (unstable idle speed, obvious engine jitter during cold start). You can find a familiar repair shop and connect to the computer to check the solar terms every once in a while. ...