C111B 2017 Chevrolet Silverado Code - Trailer Brake Power Control Module System Voltage
Quick Answer
The C111B diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado relates to the Trailer Brake Power Control Module System Voltage. Common causes include Faulty trailer brake power control module, Wiring issues or shorts in the electrical system, Weak battery or alternator. 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 2017 Chevrolet Silverado indicates Trailer Brake Power Control Module System Voltage.
- Common causes
- Common causes include Faulty trailer brake power control module, Wiring issues or shorts in the electrical system, Weak battery or alternator.
- 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 2017 Chevrolet Silverado Description
The C111B diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado relates to the Trailer Brake Power Control Module System Voltage. This code indicates a problem with the voltage levels in the trailer brake power control module, which is responsible for controlling the power supply to the trailer brakes. The module ensures that the trailer brakes receive the appropriate amount of power to effectively stop the vehicle and trailer combination.
Common Causes of C111B 2017 Chevrolet Silverado
- Faulty trailer brake power control module
- Wiring issues or shorts in the electrical system
- Weak battery or alternator
- Corrosion or damage to electrical connectors
- Overloaded trailer causing strain on the system
Symptoms of C111B 2017 Chevrolet Silverado
- Trailer brakes not engaging properly
- Trailer brake warning light illuminated on the dashboard
- Inconsistent braking performance when towing a trailer
- Loss of trailer brake functionality
- ABS system warning light activated
How to Fix C111B 2017 Chevrolet Silverado
- Begin by inspecting the wiring harness and connectors for any signs of damage or corrosion. Repair or replace as needed.
- Test the battery and alternator to ensure they are providing the correct voltage levels. Replace if necessary.
- Check the trailer brake power control module for any faults or malfunctions. Replace if found to be defective.
- Clear the DTC from the vehicle's computer system using a diagnostic tool.
- Test the trailer brake system to ensure proper functionality and voltage supply.
Cost to Fix C111B 2017 Chevrolet Silverado
The typical repair costs for addressing a C111B code on a 2017 Chevrolet Silverado can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor in your area. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple sources to get an accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.
Tech Notes for C111B 2017 Chevrolet Silverado
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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Frequently Asked Questions about C111B 2017 Chevrolet Silverado Code
1. What does the OBDII code C111B mean on a 2017 Chevrolet Silverado?
The code C111B indicates an issue with the Trailer Brake Power Control Module System Voltage, often related to low or inconsistent voltage in the trailer brake circuit.
2. What are the common symptoms of code C111B on a 2017 Chevrolet Silverado?
Symptoms include a "Service Trailer Brake System" message on the dashboard, unresponsive trailer brakes, and reduced or no trailer brake power.
3. What causes the C111B code to appear?
Common causes include a weak or failing vehicle battery, corroded or damaged wiring, poor ground connections, or a faulty trailer brake control module.
4. Can a bad trailer connection cause the C111B code?
Yes, a poor connection at the trailer plug, such as corroded pins or a loose connector, can cause voltage issues that trigger this code.
5. How can I fix the C111B code on my 2017 Chevrolet Silverado?
Start by checking the battery and charging system, inspecting the trailer brake wiring and connectors for damage or corrosion, and ensuring proper grounding. If necessary, replace the trailer brake control module.
6. Can I still drive my Silverado with the C111B code active?
Yes, you can drive the vehicle, but the trailer brakes may not function properly, which can be unsafe when towing. Address the issue promptly.
7. How do I test the trailer brake wiring to diagnose code C111B?
Use a multimeter to check for proper voltage at the trailer plug and continuity in the wiring. Look for any signs of open circuits, shorts, or poor connections.
8. Will replacing the Trailer Brake Power Control Module always fix the C111B code?
Not necessarily. The issue could be related to wiring, grounding, or the vehicle’s battery/charging system. Diagnose thoroughly before replacing the module.
9. Can a malfunctioning alternator trigger the C111B code?
Yes, a failing alternator can cause low system voltage, which may lead to the C111B code being set.
10. Is a software update ever required to clear the C111B code?
In some cases, a software update for the trailer brake control module may be necessary after repairs to ensure proper functionality. Check with your dealership if unsure.
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