What is the fault when the Volkswagen EPC light comes on?

[StVivienne]

There are two possibilities when the EPC light comes on: one is that the throttle is dirty and needs cleaning. The other situation is that the brake light is not working, requiring inspection of the brake switch and wiring. Additionally, due to fuel quality issues, the EPC warning light may also illuminate. Solutions for the Volkswagen EPC indicator light coming on include: troubleshooting the intake system, using fuel that meets standards, cleaning the throttle body; removing carbon deposits from related parts; and reprogramming the ECU with relevant data. Then, the owner can try turning off and restarting the engine to see if the EPC light remains on. If it does not, it indicates the issue has been resolved. Here are some related introductions: 1. Definition of the Volkswagen EPC light: The full English name of EPC is Electronic-Power-Control, meaning engine power electronic regulation (electronic throttle), commonly found in Volkswagen series models. The illumination of the EPC indicator light suggests there may be a fault within the electronic throttle system, which could affect the normal use of the vehicle. 2. Reasons for the EPC light coming on include: Intake system faults, such as leaks or blockages; dirty throttle body with excessive carbon deposits; use of substandard fuel; abnormal cylinder pressure, poor operating conditions; valve faults, sticking or carbon buildup; ECU faults; and sporadic faults or false alarms.