B17F6 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B17F6 – Trailer Tail Lamp Control Circuit Short To Battery


B17F6 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B17F6 Possible Causes


Faulty Trailer Tow Park Lamps Relay,Trailer Tow Park Lamps Relay harness is open or shorted,Trailer Tow Park Lamps Relay circuit poor electrical connection,Faulty Body Control Module (BCM)


B17F6 Description


Four relays are used to provide voltage to the Trailer Tow connector. The trailer tow relays are used to switch fused battery voltage directly to the Trailer Tow connector when requested. The trailer tow relays are activated through a ground path provided by the Body Control Module (BCM). The BCM sets the OBDII code when it detects a short to voltage on the Trailer Tow Park Lamps Relay Control circuit.