Audi a6epc lights up, the car shakes, and it starts and stops automatically.

EPC is called engine electronic stability system, also known as electronic throttle system. The system is mainly composed of engine adjusting unit, engine wiring harness, throttle, accelerator pedal, brake switch and manual transmission clutch switch. On Audi cars, in addition to the above components, if there is a problem with the valve lift AVS system, the EPC fault indicator light may also light up. If any component fails, the engine adjustment unit will basically trigger the EPC light directly. When the EPC fault indicator light of Audi vehicle lights up, you should first check the driver's guide prompt of the instrument cluster, and then judge whether the throttle adjustment of the vehicle is normal. If the throttle adjustment is abnormal, the situation is more serious and you need to call the police for help. If the throttle adjustment is normal, you can choose to drive to the maintenance organization slowly for processing. At this time, the repair union uses professional diagnostic equipment to read the fault memory of the engine adjustment unit. According to the content of the fault code, the next step is detected and judged. In Audi A6l models, when EPC fault indicator lights up, it is usually related to dirty accelerator or damaged accelerator pedal, brake light switch and AVS valve lift adjuster.