What is the reason why epc light is on?

In the process of engine running, the air intake system of automobile becomes an indispensable part. With the extension of vehicle service time, the air intake system may leak or be blocked, and the epc light will light up due to poor air intake when the engine is running. Throttle valve is easy to produce dirt in use, and excessive carbon deposition is an important reason for throttle valve scaling. Therefore, it is necessary to clean up the carbon deposits in time during daily car use to avoid excessive carbon deposits affecting the normal operation of the throttle. The main reasons for the EPC fault light are as follows: 1. Epcpepc 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 cold start of the engine. But for domestic car owners, most of them are basically caused by domestic oil quality and dirty environment inside the car. They should drive to the service shop for maintenance as soon as possible, and most of the cases can be solved by cleaning the throttle. 2. When the ignition switch is turned on for function test, the indicator EPC will light up. If the indicator light is on while driving, it means that the engine power electronic regulation system is out of order. The engine must be tested immediately. In most cases, dirty throttle body, vacuum leakage of intake system, broken brake switch and failure to upgrade the engine immediately may basically lead to EPC failure. 3.3 There are two possibilities. EPC light is on. 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 circuit. Because of the oil problem, the EPC fault light may also light up.