C111B:5A Code - Trailer Brake Power Control Module System Voltage Plausibility Failure
Quick Answer
The C111B:5A diagnostic trouble code (DTC) indicates a Trailer Brake Power Control Module System Voltage Plausibility Failure. Common causes include Faulty trailer brake power control module, Electrical wiring issues or shorts in the trailer brake system, Low voltage or voltage fluctuations in 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
- C111B:5A indicates Trailer Brake Power Control Module System Voltage Plausibility Failure.
- Common causes
- Common causes include Faulty trailer brake power control module, Electrical wiring issues or shorts in the trailer brake system, Low voltage or voltage fluctuations in 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.
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Code C111B:5A Description
The C111B:5A diagnostic trouble code (DTC) indicates a Trailer Brake Power Control Module System Voltage Plausibility Failure. This means that the power control module responsible for managing the trailer brake system in the vehicle has detected a voltage discrepancy that is outside the expected range. This issue can impact the proper functioning of the trailer brake system, potentially leading to safety concerns while towing. The trailer brake power control module plays a crucial role in ensuring the trailer brakes work in sync with the vehicle's braking system, providing efficient and safe braking performance when towing heavy loads.
Common Causes of C111B:5A
- Faulty trailer brake power control module.
- Electrical wiring issues or shorts in the trailer brake system.
- Low voltage or voltage fluctuations in the vehicle's electrical system.
- Corrosion or poor connections in the trailer brake system components.
Symptoms of C111B:5A
- Trailer brakes not engaging properly or inconsistently.
- ABS warning light illuminated on the dashboard.
- Trailer brake system error message displayed on the instrument panel.
- Loss of braking power or reduced braking performance while towing a trailer.
How to Fix C111B:5A
- Diagnose the exact cause of the voltage plausibility failure by conducting a thorough inspection of the trailer brake power control module and associated electrical components.
- Test the voltage output of the power control module to determine if it is within the specified range.
- Check and repair any damaged or corroded wiring in the trailer brake system.
- Replace the trailer brake power control module if it is found to be defective.
- Clear the DTC from the vehicle's system and perform a test drive to ensure the issue has been resolved.
Cost to Fix C111B:5A
The cost of repairing a Trailer Brake Power Control Module System Voltage Plausibility Failure can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this type of problem can range from $200 to $500, including parts and labor. However, it is essential to note that the actual cost may differ based on the location, vehicle make and model, and the rates charged by the auto repair shop. It is recommended to obtain quotes from multiple repair shops to compare prices and ensure a fair and accurate estimate.
Tech Notes for C111B:5A
C111B:07 Trailer Brake Power Control Module System Voltage Above Threshold
C111B:5A Trailer Brake Power Control Module System Voltage Plausibility Failure
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