C111B 2014 GMC Sierra Code - Trailer Brake Power Control Module System Voltage
Quick Answer
The Chassis Control Module-Auxiliary 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. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C111B 2014 GMC Sierra indicates Trailer Brake Power Control Module System Voltage.
- Common causes
- Common causes include 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.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C111B 2014 GMC Sierra Description
What are the Possible Causes of the DTC C111B 2014 GMC Sierra?
- 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
- Faulty Chassis Control Module-Auxiliary
How to Fix the DTC C111B 2014 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
C111B:07 Trailer Brake Power Control Module System Voltage Above Threshold
C111B:5A Trailer Brake Power Control Module System Voltage Plausibility Failure
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C111B 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about C111B 2014 GMC Sierra Code
What does the OBDII code C111B mean for a 2014 GMC Sierra?
It indicates a problem with the Trailer Brake Power Control Module System Voltage, often related to low or unstable power supply to the trailer brake system.
What are common symptoms of code C111B?
Symptoms may include a "Service Trailer Brake System" warning message, reduced or non-functional trailer brakes, or inconsistent braking performance while towing.
What causes the C111B code to appear on a 2014 GMC Sierra?
Common causes include a weak or failing battery, corroded or loose electrical connections, damaged wiring, or a malfunctioning Trailer Brake Control Module.
Can a bad trailer brake control module trigger code C111B?
Yes, a faulty trailer brake control module can cause voltage issues and trigger this code.
How can I diagnose the issue behind code C111B?
Start by inspecting the battery, trailer brake wiring, and connections for damage or corrosion. Use a multimeter to verify voltage levels at the module and trailer connector.
Do I need specialized tools to fix code C111B?
You may need a multimeter to check voltage and an OBDII scanner to clear the code after repairs.
Can towing with code C111B affect safety?
Yes, towing with this code can compromise trailer braking performance and pose a safety risk.
How do I fix code C111B on my 2014 GMC Sierra?
Repair steps include cleaning or tightening electrical connections, replacing damaged wiring, and potentially replacing the Trailer Brake Control Module if it is defective.
Does code C111B require module reprogramming after repairs?
In some cases, replacing the Trailer Brake Control Module may require reprogramming using dealership tools or specialized equipment.
Can code C111B be caused by a problem with the trailer itself?
Yes, issues such as faulty trailer wiring or a short circuit in the trailer’s brake system can contribute to this code.
Discuss the causes and fixes for C111B 2014 GMC Sierra OBDII Code
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