C1112 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1112 – Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction
C1112 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1112 Possible Causes
Faulty Trailer Brake Power Control Module,Trailer Brake Power Control Module harness is open or shorted,Trailer Brake Power Control Module circuit poor electrical connection
The chassis control module receives inputs from the trailer brake power control module; these inputs are used to determine trailer connection and the amount of voltage supplied to the trailer brakes. The trailer brake power control module detects a short to ground, open or a short to voltage on the trailer brake control signal circuit.