C111B GMC 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 GMC 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 GMC Description
What are the Possible Causes of the DTC C111B GMC?
- 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 GMC?
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 GMC 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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Information for Specific GMC Models
- C111B 2014 GMC Sierra — Trailer Brake Power Control Module System Voltage
- C111B 2015 GMC Sierra — Trailer Brake Power Control Module System Voltage
- C111B 2016 GMC Sierra — Trailer Brake Power Control Module System Voltage
- C111B 2017 GMC Sierra — Trailer Brake Power Control Module System Voltage
- C111B 2018 GMC Sierra — Trailer Brake Power Control Module System Voltage
Frequently Asked Questions about C111B GMC Code
1. What are common symptoms of OBDII code C111B GMC?
- Common symptoms include trailer brake system malfunctions, warning lights on the dashboard, and issues with the trailer brake power control module.
2. What causes the OBDII code C111B GMC to trigger?
- The code C111B is triggered when the powertrain control module (PCM) detects a voltage discrepancy in the trailer brake power control module system.
3. How can I diagnose the issue related to code C111B GMC?
- Use a diagnostic scanner to retrieve the trouble codes, check the trailer brake system components for any visible damage or loose connections, and test the system voltage with a multimeter.
4. Can a faulty trailer brake power control module cause code C111B GMC?
- Yes, a malfunctioning trailer brake power control module can cause the code C111B to trigger due to voltage irregularities in the system.
5. What are some repair tips for fixing OBDII code C111B GMC?
- Inspect and repair any damaged wiring or connectors in the trailer brake system, replace the trailer brake power control module if necessary, and reset the trouble codes after the repairs.
6. Is it safe to drive with OBDII code C111B GMC active?
- It is not recommended to drive with the code C111B active, as it indicates potential issues with the trailer brake system that could affect braking performance while towing.
7. Can a DIY enthusiast fix OBDII code C111B GMC at home?
- Depending on their skill level, DIY enthusiasts may be able to diagnose and repair the issues related to code C111B by following repair manuals or online guides, but professional help may be needed for complex issues.
8. How much does it typically cost to repair OBDII code C111B GMC?
- The cost of repairing code C111B can vary widely depending on the underlying issue, but it may involve expenses for diagnostic tools, replacement parts, and labor at a mechanic's shop.
9. Will resetting the trouble codes make OBDII code C111B GMC go away permanently?
- Resetting the trouble codes may temporarily clear the code C111B, but if the underlying issue in the trailer brake power control module system is not fixed, the code is likely to reappear.
10. Is code C111B GMC a common issue in GMC vehicles?
- While not as common as some other OBDII codes, C111B can still occur in GMC vehicles with trailer brake systems, especially in cases of electrical faults or component failures.
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