Question: when the Shanghai Volkswagen transmission control system of Shanghai Volkswagen control transmission control system is stored in the fault code 17105, how should it be excluded from this kind of fault? Answer: fault code 17105 refers to the failure of the transmission output shaft speed sensor G195 signal. The possible reasons for the failure are as follows: (1) the fault of the sensor itself; (2) the fault of the sensor line; (3) the fault of the control unit of the transmission; (4) the mechanical failure of the transmission. But for Passat, the above reasons may not exist. It is very likely that the automatic lighting system control unit or its connector fault.