What is the reason why the fault light epc is on?

The EPC fault light is always on, indicating that the engine management system or electronic control is out of order.

It is often accompanied by the phenomenon of unstable idle speed of vehicles or engine jitter during cold start. But for domestic car owners, it is generally caused by domestic oil quality and dirty environment inside the car. Drive to the maintenance service station as soon as possible for maintenance, and generally clean the throttle.

When the ignition switch is turned on for function check, the indicator EPC will light up. If the indicator lights up while driving, it indicates that the engine power electronic control system is out of order. The engine must be checked immediately. Under normal circumstances, dirty throttle body, vacuum leakage of intake system, broken brake switch and untimely engine upgrade may all lead to EPC failure.