What happened when the epc light turned on and disappeared after starting?

It is normal for epc light to go out after startup. The following is the related introduction: 1, the reason why the epc light goes out: After the ignition switch is turned on, the fault light will light up the car, and after the system self-test, the fault light will go out. 2. Introduction of 2.epc: It is called the engine electronic power control system. Many people also call it electronic throttle control. In EPC system, the original throttle line is cancelled, and the ECU is replaced by the sensor of pedal device. According to the position data fed back by the sensor of the pedal device, the optimal target throttle opening is calculated, and a signal is sent to the throttle drive motor to make the throttle rotate to this angle.