Engine-CodesGMC – C111A 2014 GMC Sierra

C111A 2014 GMC Sierra Code - Trailer Brake Power Control Module

Quick Answer

The C111A code for a 2014 GMC Sierra indicates a problem with the Trailer Brake Power Control Module. Common causes include Faulty Trailer Brake Power Control Module, Damaged wiring or connectors in the trailer brake system, Issues with the vehicle's electrical system. 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
C111A 2014 GMC Sierra indicates Trailer Brake Power Control Module.
Common causes
Common causes include Faulty Trailer Brake Power Control Module, Damaged wiring or connectors in the trailer brake system, Issues with the vehicle's electrical system.
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.
Table of contents Created and updated by William Orellana on Sep 18, 2024
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Code C111A 2014 GMC Sierra Description

The C111A code for a 2014 GMC Sierra indicates a problem with the Trailer Brake Power Control Module. This module is responsible for controlling the power supply to the trailer brakes, ensuring they function properly when towing a trailer. When this code is triggered, it means that there is a malfunction or communication issue with the module, which can lead to various problems with the trailer brake system.

OBDII Code C111A 2014 GMC Sierra - Trailer Brake Power Control Module
C111A 2014 GMC Sierra Code - Trailer Brake Power Control Module

Common Causes of C111A 2014 GMC Sierra

  1. Faulty Trailer Brake Power Control Module
  2. Damaged wiring or connectors in the trailer brake system
  3. Issues with the vehicle's electrical system
  4. Poor connection or communication problems within the brake system
  5. Corrosion or water damage affecting the trailer brake components

Symptoms of C111A 2014 GMC Sierra

  1. Trailer brakes not engaging properly
  2. Trailer brake warning light on the dashboard
  3. Uneven braking when towing a trailer
  4. Loss of trailer brake functionality
  5. ABS system warning light may also be illuminated

How to Fix C111A 2014 GMC Sierra

  1. Begin by inspecting the Trailer Brake Power Control Module for any visible damage or loose connections.
  2. Check the wiring and connectors in the trailer brake system for any signs of wear or corrosion.
  3. Test the module's functionality using a diagnostic tool to identify the specific issue.
  4. Replace the faulty module or repair any damaged wiring or connectors as needed.
  5. Clear the diagnostic trouble codes from the vehicle's system and test the trailer brake system to ensure proper functionality.

Cost to Fix C111A 2014 GMC Sierra

The cost of repairing a Trailer Brake Power Control Module issue can vary depending on the extent of the damage and the specific parts needed for the repair. On average, the parts for this repair can range from $200 to $500, while the labor costs can be between $100 and $300. Overall, the total repair cost for this issue may fall between $300 and $800. It's important to note that these are rough estimates, and actual costs may differ based on various factors such as location, labor rates, and the availability of parts. It's recommended to consult with a professional mechanic for a more accurate cost estimate.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C111A 2014 GMC Sierra Code

1. What does OBDII code C111A for a 2014 GMC Sierra Trailer Brake Power Control Module indicate?

This code typically points to a fault in the trailer brake power control module, signaling an issue with the trailer brake system.

2. What are common symptoms of OBDII code C111A in a 2014 GMC Sierra?

Common symptoms include trailer brake system malfunctions, such as non-responsive brakes, inconsistent braking, or warning lights on the dashboard.

3. What are possible causes of OBDII code C111A in a 2014 GMC Sierra?

Potential causes include a faulty trailer brake power control module, damaged wiring connections, corroded terminals, or issues with the trailer brake system itself.

4. How can I diagnose the OBDII code C111A in my 2014 GMC Sierra?

To diagnose this code, you can use an OBDII scanner to retrieve the specific fault code, inspect the trailer brake power control module and related wiring for any visible damage, and test the trailer brake system components.

5. Can I still drive my 2014 GMC Sierra with OBDII code C111A?

It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the trailer brake system that could compromise braking performance and safety.

6. How can I repair OBDII code C111A in my 2014 GMC Sierra?

Repair options may include replacing the trailer brake power control module, repairing or replacing damaged wiring, cleaning corroded terminals, or addressing any underlying issues with the trailer brake system.

7. Is it necessary to reset the OBDII code C111A after making repairs on a 2014 GMC Sierra?

Yes, it is important to clear the code using an OBDII scanner after resolving the underlying issue to reset the system and ensure the code does not reappear.

8. Can a DIY enthusiast fix OBDII code C111A in a 2014 GMC Sierra?

Depending on their experience and tools available, a DIY enthusiast may be able to address this code by following repair procedures outlined in the vehicle's service manual or seeking assistance from online resources.

9. Is it common for the trailer brake power control module to fail in a 2014 GMC Sierra?

While not extremely common, failures in the trailer brake power control module can occur due to various factors such as age, wear and tear, electrical issues, or improper trailer brake system usage.

10. How can I prevent OBDII code C111A from appearing in my 2014 GMC Sierra in the future?

Regular maintenance, inspecting the trailer brake system for any signs of wear or damage, ensuring proper connections, and addressing any issues promptly can help prevent the recurrence of this OBDII code.

Discuss the causes and fixes for C111A 2014 GMC Sierra OBDII Code

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