C111B 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC C111B 2018 Chevrolet Silverado?
- 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 2018 Chevrolet Silverado?
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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code
1. What does the OBDII code C111B mean on a 2018 Chevrolet Silverado?
The code C111B indicates an issue with the Trailer Brake Power Control Module System Voltage, often related to low or unstable voltage in the system.
2. What are the common symptoms of the C111B code?
Symptoms may include the trailer brake system not functioning, a warning message on the dashboard, and reduced or no trailer braking performance.
3. What causes the C111B code on a 2018 Chevrolet Silverado?
Common causes include a weak or failing vehicle battery, poor electrical connections, damaged wiring, or a malfunctioning Trailer Brake Power Control Module.
4. How do I diagnose the C111B code?
Start by checking the vehicle battery voltage, inspecting wiring and connectors for damage or corrosion, and testing the Trailer Brake Power Control Module for proper operation.
5. Can a bad ground connection cause the C111B code?
Yes, a poor ground connection can lead to voltage issues in the trailer brake system and trigger the C111B code.
6. How can I fix the C111B code on my Silverado?
Repairs may include cleaning or tightening electrical connections, replacing damaged wiring, recharging or replacing the battery, or replacing the Trailer Brake Power Control Module if faulty.
7. Is it safe to tow a trailer with the C111B code active?
It is not recommended to tow with this code active, as the trailer brake system may not function properly, increasing the risk of accidents.
8. Can a faulty trailer cause the C111B code?
Yes, a trailer with damaged wiring or a short circuit can cause voltage issues in the trailer brake system and trigger the code.
9. How much does it cost to fix the C111B code?
Repair costs vary depending on the issue. A simple fix like cleaning connections may cost little to nothing, while replacing the Trailer Brake Power Control Module could cost several hundred dollars.
10. Does the C111B code require professional repair?
While some fixes, like inspecting wiring and connections, can be done at home, diagnosing and repairing module-related issues may require professional tools and expertise.
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