Automobile fault code changan automobile B 120 149

Throttle position (TP) sensor B/ accelerator pedal position (APP) sensor b-circuit fault.

The function of the throttle position (TP) sensor is to send the throttle opening to the electronic control unit (ECU) in the form of electrical signal, which is one of the basic parameters to control the fuel injection of the engine. In the Electronic Throttle Control (ETC) system, the function of the pedal position (APP) sensor is to convert the position of the accelerator pedal into an electrical signal.