What's wrong with epc light of Volkswagen Golf?

Epc light of Volkswagen Golf is mainly caused by dirty throttle body, which can be solved by cleaning the throttle and re-matching. There is also a leak in the air intake system, which causes the engine control unit to light the epc warning light after detecting the problem. The following is an extended introduction: 1, EPC introduction: EPC is the full name of ElectronicPowerControl (engine electronic stability system), and many people also call it electronic throttle. EPC indicator lights are more common in the public. After the key door is opened, the EPC indicator light will light up for a few seconds and then go out. If the vehicle does not go out after starting, it means that the mechanical and electronic system of the vehicle has failed. 2. Other reasons leading to EPC lighting: the leakage of crankcase ventilation system will also lead to this failure; Serious or obvious vacuum leakage is not a problem, only slight leakage control unit can not effectively detect that the compensation adjustment made by the control unit exceeds the limit allowed by the internal program of the control unit, and the control unit will judge that there is a problem with the electronic throttle system and the epc fault light will be on; However, the actual reason for the epc light to light up in this process is not the functional problem of the electronic throttle control system itself, but also the failure of the brake light switch.