C111B 2016 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 2016 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 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC C111B 2016 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 2016 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 2016 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 2016 Chevrolet Silverado Code
1. What does the OBDII code C111B mean on a 2016 Chevrolet Silverado?
The code C111B indicates a voltage issue in the Trailer Brake Power Control Module system, typically related to improper power or ground connections.
2. What are common symptoms of the C111B code?
Common symptoms include a "Service Trailer Brake System" message on the dashboard, trailer brakes not functioning, and possibly reduced braking performance when towing.
3. What causes the C111B code to appear?
The code is often caused by a faulty trailer brake control module, corroded electrical connections, damaged wiring, or low voltage from the battery or alternator.
4. Can a weak battery trigger the C111B code?
Yes, a weak or failing battery can reduce system voltage and trigger the C111B code, especially under load.
5. How do I diagnose the C111B code?
Start by inspecting the trailer brake control module, checking for corroded or loose connections, testing the wiring harness for damage, and measuring the system's voltage and ground continuity.
6. Can a faulty trailer brake control module cause the C111B code?
Yes, a defective trailer brake control module is a common cause of this code and may need to be replaced if other components check out.
7. How do I fix the C111B code on my Silverado?
Repairs may include cleaning or repairing electrical connections, replacing damaged wiring, or replacing the trailer brake control module if it is confirmed to be faulty.
8. Is it safe to drive with the C111B code active?
Driving without functional trailer brakes can be unsafe, especially when towing heavy loads, as it increases stopping distances and reduces control.
9. Does the C111B code always require module replacement?
No, the issue may simply be due to poor electrical connections or wiring issues, so thorough diagnostics should be performed before replacing the module.
10. Can a blown fuse cause the C111B code?
Yes, a blown fuse in the trailer brake power circuit can disrupt voltage and trigger the C111B code. Inspect and replace any blown fuses as needed.
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