What does it mean that the epc light of Audi q7 is on?

EPC is the abbreviation of "electronic power control" in English, which means electronic throttle in Chinese.

EPC= electronic power control in this system. Different from the previous method of controlling the throttle opening by cable, the throttle is driven by DC motor in the whole adjustment range.

In the past, the driver controlled the accelerator pedal according to the power demand of the engine, and the accelerator pedal controlled the accelerator opening through a steel wire rope. In EPC system, the former accelerator cable is replaced by the sensor of pedal device, and the engine control unit (ECU) calculates the optimal target accelerator opening according to the position data fed back by the sensor of pedal device, and sends a signal to the accelerator drive motor to make the accelerator rotate to this angle.

If there is a fault in the system, the engine control unit will light the lamp and the fault will be remembered. The control of the accelerator pedal will respond. If it is completely damaged, the engine speed will not be adjusted. The engine will idle at the speed of 1500 rpm to ensure that it can travel to the maintenance station for maintenance.