What's wrong with Volkswagen epc lamp and how to solve it?

EPC is an electronic throttle fault light. 1. Because the throttle body is too dirty, this situation only needs to clean the throttle and then re-match. If the throttle valve is reported to be faulty after cleaning, it is a problem of the throttle valve itself and needs to be replaced; The air intake system leaks, and the engine computer lights up the EPC warning light after detecting the problem; The failure of Volkswagen brake light switch can also lead to this phenomenon. As long as the fault light is on, it must be monitored by the diagnostic computer to find the specific fault location. It is impossible to 100% confirm the fault position only by turning on the fault light. If you change the parts blindly, just take a chance and change them once. If you have bad luck, you have to change it many times, which may not solve the problem.