What is EPC in cars?

[McMarcus]

EPC in cars refers to the Electronic Power Control system of the engine, also known as the electronic throttle. After turning the ignition key, the vehicle begins self-checking, and the EPC indicator light will illuminate for a few seconds before turning off. If it remains on after the vehicle starts, it indicates a malfunction in the vehicle's mechanical or electronic systems, requiring timely inspection and repair. Common reasons for the EPC light to stay on include: 1. A dirty throttle body, which should be cleaned; 2. Non-functioning brake lights, necessitating inspection of the brake switch and wiring. In the EPC system, the traditional throttle cable is eliminated, replaced by a sensor in the pedal assembly. The engine control unit calculates the appropriate target throttle opening based on the position data fed back by the pedal sensor and sends a signal to the throttle actuator motor to rotate the throttle to the desired angle.