Trailer Brake Power Control Module System Voltage Voltage Below Threshold
Table of contents
C111B BUICK 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
How do I fix code C111B BUICK?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- – C111B:03 Trailer Brake Power Control Module System Voltage – Voltage Below Threshold
- – C111B:07 Trailer Brake Power Control Module System Voltage – Voltage Above Threshold
- – C111B:5A Trailer Brake Power Control Module System Voltage – Plausibility Failure
Cost of diagnosing the C111B BUICK code
The cost of diagnosing the C111B BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C111B BUICK Description
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 voltage below a calibrated threshold on the battery positive voltage circuit.