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

The reasons why the epc fault light of Pacific Auto Network Volkswagen is on are: 1, the engine throttle is too dirty; 2. The driving computer system has failed; 3. There is a leak in the air intake system.

Volkswagen Tiguan's epc fault light is on, which may be caused by a problem with the driving computer system, dirty engine throttle, or a leak in the air intake system, causing the engine control unit to light the EPC warning light after detecting the problem.

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

2. When the ignition switch is turned on for function check, the indicator EPC will light up. If this 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.

3. When the EPC light is on, there are two possibilities.

First, the throttle is dirty and needs cleaning. In another case, the brake lights don't work. Replace the light bulb or check the brake switch and wiring. Also, due to the oil problem, the EPC fault light will also light up.

EPC=ElectronicPowerControl (full name of engine electronic stability system), many people also call it electronic throttle. EPC indicator lights are more common in the public. After the key door is opened, the vehicle starts self-inspection, and the EPC indicator light will light up for a few seconds and then go out. If the vehicle does not go out after starting, it means that the mechanical and electronic system of the vehicle has failed. Generally speaking, EPC lights have two possibilities.

First, the throttle is dirty and needs cleaning. In another case, the brake light is not on, so it is necessary to check the brake switch and wiring.

(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)