C111B:03 Code - Trailer Brake Power Control Module System Voltage Below Threshold
Quick Answer
The C111B:03 code indicates that the Trailer Brake Power Control Module System voltage is below the threshold required for proper operation. Common causes include Faulty Trailer Brake Power Control Module, Wiring issues or short circuits in the trailer brake system, Low battery voltage or charging system problems. 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:03 indicates Trailer Brake Power Control Module System Voltage Below Threshold.
- Common causes
- Common causes include Faulty Trailer Brake Power Control Module, Wiring issues or short circuits in the trailer brake system, Low battery voltage or charging system problems.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code C111B:03 Description
The C111B:03 code indicates that the Trailer Brake Power Control Module System voltage is below the threshold required for proper operation. The Trailer Brake Power Control Module is responsible for managing the power distribution to the trailer brakes, ensuring they function correctly when the vehicle is towing a trailer. When the system voltage falls below the specified threshold, it can lead to issues with the trailer brake system, potentially compromising the vehicle's ability to safely stop when towing.
Common Causes of C111B:03
- Faulty Trailer Brake Power Control Module.
- Wiring issues or short circuits in the trailer brake system.
- Low battery voltage or charging system problems.
- Corrosion or poor connections in the electrical components related to the trailer brake system.
- Malfunctioning voltage regulator affecting the power supply to the Trailer Brake Power Control Module.
Symptoms of C111B:03
- Illumination of the trailer brake warning light on the dashboard.
- Inability to engage or control the trailer brakes effectively.
- Reduced braking performance when towing a trailer.
- Erratic behavior of the trailer brake system.
- Increased stopping distances when towing a trailer.
How to Fix C111B:03
- Begin by performing a thorough inspection of the trailer brake system components, including the Trailer Brake Power Control Module, wiring, and connections.
- Test the battery voltage and charging system to ensure they are operating within the manufacturer's specifications.
- Check for any corrosion or loose connections in the electrical system and repair or replace as necessary.
- If the Trailer Brake Power Control Module is found to be faulty, it may need to be replaced with a new unit.
- After completing the repairs, clear the diagnostic trouble codes and test the trailer brake system to ensure proper functionality.
Cost to Fix C111B:03
The cost of repairing a Trailer Brake Power Control Module System voltage below threshold issue can vary depending on the specific cause of the problem and the parts needed for the repair. On average, the repair costs for this issue could range from $200 to $500, including parts and labor. However, it's essential to note that labor rates and diagnosis times can vary significantly, so it's advisable to consult with a reputable auto repair shop for a more accurate estimate.
Tech Notes for C111B:03
C111B:07 Trailer Brake Power Control Module System Voltage Above Threshold
C111B:5A Trailer Brake Power Control Module System Voltage Plausibility Failure
Need more information about the C111B:03 code?
Need more information on how to fix the C111B:03 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C111B:03 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C111B:03 Code
No Frequently Asked Questions about C111B:03 Code found.
Discuss the causes and fixes for C111B:03 OBDII Code
Code C111B:03 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.