Citroen tianyi engine failure fan crazy rotation

Engine control unit is faulty. The faulty fan of Citroen Tianyi engine runs wildly because of the failure of the engine control unit, which belongs to the engine degradation mode. In most cases, it is because of too much carbon deposition in the throttle valve, which leads to a great difference in the concentration of mixed gas. It is necessary to clean up the carbon deposit on the throttle first.