What is the reason why the EPC light is on when Audi Q3 is driving?

The reason why the EPC light is on when Audi Q3 is driving is that the throttle valve is dirty, so it should be removed and cleaned before being installed. If necessary, please dial the fault code to troubleshoot. The other is that the brake lights don't work. Replace the light bulb or check the brake switch and wiring. There is also the oil problem, and the EPC fault light will also light up.

The main reasons for the lighting of automobile EPC fault light;

1.EPC fault light is always on, indicating that there is a fault in the engine management system or electronic control, which is often accompanied by unstable idle speed of the vehicle or engine cold start jitter. But for domestic car owners, it is generally caused by domestic oil quality and dirty environment inside the car. Drive to the maintenance station as soon as possible for maintenance. Generally, cleaning the throttle can solve the problem.

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

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