Volkswagen epc and engine are turned on at the same time, and the battery is also turned on.

Volkswagen epc refers to the electronic stability system of the engine, and the engine fault light lights up to indicate engine fault. When the car is ignited, the epc indicator light will generally light up, and the car will enter the self-inspection procedure. Epc lighting time lasts about 2-3 seconds. If the indicator light is not turned off, there is something wrong with the electronic stability system of the car. If the car lights up epc while driving, don't drive too fast when changing lanes or turning. Try to control the vehicle speed, and the engine fault light is on, indicating that there is something wrong with the engine system. Stop the car immediately for inspection or go to a professional repair shop for inspection and maintenance. The reasons for the epc fault indicator light to light up are: leakage or blockage of the air intake system, dust or carbon accumulation in the throttle, unqualified or substandard oil products, abnormal internal operation of the engine, epc sensor fault or ECU fault. The failure light of epc is mostly caused by carbon deposition of electronic throttle or unclean pipeline. In this case, you only need to go to the 4s shop to clean up the carbon deposit. It is recommended to maintain the car within the specified time. Don't wait until the fault light is on, and then consider maintenance if there is a problem during driving.