What does the EPC light on the dashboard of Volkswagen Lavida mean?

[ValentinaMarie]

EPC indicator light staying on indicates a fault in the engine or electronic system. If the light remains illuminated or flashes after ignition or during driving, it means the management system has detected a fault in the engine or electronic system. When a sensor fails or detects an abnormal condition, the control system will take corresponding measures according to the preset program. For example: when we are accelerating, the control unit detects that the throttle is in the open position. At this time, due to a fault in the brake light switch itself, the control unit receives a brake signal from the brake light switch. According to the program, the control unit will reduce the fuel injection time and decrease the engine power output. However, the control unit also receives an acceleration request signal from the throttle, and the computer considers these two signals contradictory. When the control unit cannot accurately determine the cause of the fault, it will first illuminate the EPC light to alert the user to check. In this sense, the EPC light is somewhat similar to a fault indicator light or the engine "check" light more commonly seen in American cars. The EPC indicator light is relatively common in Volkswagen vehicles. After turning the ignition key, the vehicle begins self-checking, and the EPC light will illuminate for a few seconds before turning off. If the light does not go off after the vehicle starts, it indicates a fault in the vehicle's mechanical and electronic systems. Generally, there are two possible reasons for the EPC light to come on. One is that the throttle is dirty and needs cleaning. The other situation is that the brake lights are not working, requiring inspection of the brake switch and wiring. Additionally, due to fuel quality issues, the EPC fault light may also illuminate. Generally, if the EPC light comes on in a Volkswagen vehicle, it indicates a problem, and it is recommended to go to a 4S store for inspection as soon as possible.