C1112 Buick Code - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction
Quick Answer
The chassis control module 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
- 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, 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 C1112 Buick Description
What are the Possible Causes of the DTC C1112 Buick?
- 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
How to Fix the DTC C1112 Buick?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1112 Buick 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 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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