C279A Code: Meaning, Causes, and Symptoms | OBD2 Codes

C279A – Invalid Brake Pressure Transducer Pressure Input Received


C279A Possible Symptoms


Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)


C279A Possible Causes


Faulty Brake Pressure Transducer,Brake Pressure Transducer harness is open or shorted,Brake Pressure Transducer circuit poor electrical connection,Faulty Trailer Brake Control (TBC) Module


C279A Description


The Brake Pressure Transducer is attached to the brake master cylinder and is hardwired to the Trailer Brake Control (TBC) Module. The transducer and the master cylinder are installed new as an assembly. The TBC module supplies voltage to the transducer and ground along circuits. The voltage returned from the transducer and is used by the TBC module to determine current brake pressure. Trailer Brake Control (TBC) Module sets the OBDII code when the Brake Pressure Transducer is not to factory specifications.