C1112 Buick Code - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction
Quick Answer
The C1112 Buick diagnostic trouble code (DTC) indicates a malfunction in the Trailer Brake Signal to Trailer Brake Power Control Module Circuit. Common causes include Faulty Trailer Brake Power Control Module, Wiring issues or loose connections in the trailer brake system, Corrosion or damage to the trailer brake signal circuit. 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
- C1112 Buick indicates Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction.
- Common causes
- Common causes include Faulty Trailer Brake Power Control Module, Wiring issues or loose connections in the trailer brake system, Corrosion or damage to the trailer brake signal circuit.
- 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 C1112 Buick Description
The C1112 Buick diagnostic trouble code (DTC) indicates a malfunction in the Trailer Brake Signal to Trailer Brake Power Control Module Circuit. This code is typically found in vehicles equipped with a trailer brake system, which helps control the braking of a trailer being towed by the vehicle. The Trailer Brake Power Control Module is responsible for managing the trailer brake system, ensuring proper braking performance and control.
Common Causes of C1112 Buick
- Faulty Trailer Brake Power Control Module.
- Wiring issues or loose connections in the trailer brake system.
- Corrosion or damage to the trailer brake signal circuit.
- Issues with the vehicle's brake system affecting communication with the trailer brake system.
Symptoms of C1112 Buick
- Illumination of the trailer brake warning light on the dashboard.
- Inconsistent or delayed response from the trailer brakes when braking.
- Abnormal braking behavior, such as the trailer brakes engaging too forcefully or not at all.
- Decreased braking performance while towing a trailer.
How to Fix C1112 Buick
- Begin by conducting a thorough inspection of the trailer brake system, including the Trailer Brake Power Control Module, wiring, and connections.
- Test the trailer brake signal circuit for continuity and proper voltage levels.
- Replace any damaged wiring or connectors in the trailer brake system.
- If the Trailer Brake Power Control Module is faulty, replace it with a new unit.
- Clear the DTC from the vehicle's onboard computer and test the trailer brake system for proper operation.
Cost to Fix C1112 Buick
The typical repair costs for addressing a C1112 Buick code can vary depending on the specific cause of the issue and the parts/labour required for the repair. In general, the cost of parts for this repair can range from $100 to $300, while labour costs may range from $100 to $200. Overall, the total repair cost for this issue can be estimated to be between $200 and $500. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop's rates. It is recommended to obtain quotes from local auto repair shops for a more accurate cost estimate.
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Frequently Asked Questions about C1112 Buick Code
1. What does the OBDII code C1112 mean on a Buick?
C1112 indicates a Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction, meaning the vehicle has detected an issue in the communication or power circuit between the trailer brake signal and the control module.
2. What are the common symptoms of the C1112 code on a Buick?
Common symptoms include the trailer brakes not functioning properly, warning lights on the dashboard, and difficulty controlling the trailer during braking.
3. What causes the C1112 code to appear on a Buick?
Possible causes include damaged or corroded wiring, a faulty trailer brake power control module, a defective trailer brake switch, or poor connections in the trailer brake circuit.
4. Can I still drive my Buick with the C1112 code active?
Yes, you can drive the vehicle, but towing a trailer is not recommended as the trailer brake system may not function correctly, which can compromise safety.
5. How do I diagnose the C1112 code on my Buick?
Start by inspecting the wiring and connectors in the trailer brake circuit for damage or corrosion. Use a multimeter to check for proper voltage and continuity, and test the trailer brake power control module and switch for faults.
6. How can I fix the C1112 code on a Buick?
Repairs may involve replacing damaged wiring, cleaning corroded connections, replacing a faulty trailer brake switch, or replacing the trailer brake power control module if it is defective.
7. How much does it cost to repair the C1112 code on a Buick?
The cost can vary depending on the issue. Replacing a trailer brake switch might cost $50-$150, while a trailer brake power control module could cost $300-$500, excluding labor.
8. Can a blown fuse cause the C1112 code on a Buick?
Yes, a blown fuse in the trailer brake circuit can disrupt power or communication, triggering the C1112 code.
9. Will clearing the C1112 code with a scanner fix the problem?
Clearing the code will remove the warning temporarily, but the underlying issue must be resolved to prevent the code from returning.
10. Is the C1112 code a common issue on Buick vehicles?
While not extremely common, the C1112 code can occur in Buicks equipped with trailer brake systems, particularly if the system is exposed to wear, corrosion, or improper maintenance.
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