Audi a4 fault code p0 12200

P0 122: Throttle/accelerator pedal position sensor/switch A circuit is low.

In the Electronic Throttle Control (ETC) system, the function of the accelerator pedal position (APP) sensor is to transmit the position of the accelerator pedal to the throttle control module in the form of an electrical signal, which serves as a reference for the throttle actuator to control the throttle opening. This fault code indicates that the signal voltage of electronic accelerator pedal position sensor A is lower than the calibrated minimum value (0. 17v). The fault causes include open circuit of sensor signal circuit, short circuit of sensor signal circuit to ground, open circuit of sensor reference voltage circuit, fault of sensor itself or fault of electronic control module (PCM or ECM), etc. I hope I can help you. You can continue to consult if you have any questions. Bon voyage!