C1118 2014 GMC Sierra Code - Trailer Brake Control Sensitivity Switch Circuit Malfunction
Quick Answer
The trailer brake control system has a control panel with the trailer gain and manual apply switches. Common causes include Faulty Trailer Brake Control Switch, Trailer Brake Control Switch harness is open or shorted, Trailer Brake Control Switch 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
- C1118 2014 GMC Sierra indicates Trailer Brake Control Sensitivity Switch Circuit Malfunction.
- Common causes
- Common causes include Faulty Trailer Brake Control Switch, Trailer Brake Control Switch harness is open or shorted, Trailer Brake Control Switch 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 C1118 2014 GMC Sierra Description
What are the Possible Causes of the DTC C1118 2014 GMC Sierra?
- Faulty Trailer Brake Control Switch
- Trailer Brake Control Switch harness is open or shorted
- Trailer Brake Control Switch circuit poor electrical connection
- Faulty Chassis Control Module-Auxiliary
How to Fix the DTC C1118 2014 GMC Sierra?
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 C1118 2014 GMC Sierra 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 C1118 2014 GMC Sierra Code
1. What are the common symptoms of OBDII code C1118 on a 2014 GMC Sierra related to the Trailer Brake Control Sensitivity Switch Circuit Malfunction?
- Common symptoms include the trailer brake system not functioning properly, warning lights on the dashboard, and potential issues with the sensitivity switch.
2. What can cause the C1118 OBDII code to trigger in a 2014 GMC Sierra?
- The code can be triggered by a malfunction in the sensitivity switch circuit, damaged wiring, faulty connections, or issues with the trailer brake control module.
3. How can I diagnose the Trailer Brake Control Sensitivity Switch Circuit Malfunction on my 2014 GMC Sierra?
- Diagnosis involves checking the sensitivity switch, inspecting wiring for damage, testing connections, and using a diagnostic scanner to read the specific trouble code.
4. Are there any quick checks or fixes I can try for the C1118 code on my 2014 GMC Sierra?
- Quick checks include ensuring the sensitivity switch is properly adjusted, checking for loose connections, and inspecting the wiring harness for any visible damage.
5. Can I continue to drive my 2014 GMC Sierra with the C1118 code related to the Trailer Brake Control Sensitivity Switch Circuit Malfunction?
- It is not recommended to drive the vehicle with this code active, as it can affect the trailer brake system's functionality and potentially compromise safety while towing.
6. What is the typical repair process for resolving the C1118 code on a 2014 GMC Sierra?
- The repair process may involve replacing the sensitivity switch, repairing damaged wiring, addressing faulty connections, or replacing the trailer brake control module if necessary.
7. How much does it cost to fix the Trailer Brake Control Sensitivity Switch Circuit Malfunction on a 2014 GMC Sierra?
- Repair costs can vary depending on the exact cause of the issue, but it is advisable to consult with a professional mechanic for an accurate diagnosis and cost estimate.
8. Can a DIY enthusiast with automotive knowledge fix the C1118 code on a 2014 GMC Sierra?
- While some basic checks and fixes may be possible for DIY enthusiasts, diagnosing and repairing the sensitivity switch circuit malfunction may require specialized tools and expertise best handled by a professional mechanic.
9. Will resetting the OBDII system clear the C1118 code on a 2014 GMC Sierra?
- Resetting the system may temporarily clear the code, but if the underlying issue causing the Trailer Brake Control Sensitivity Switch Circuit Malfunction is not addressed, the code is likely to reappear.
10. How can I prevent the recurrence of the C1118 code on my 2014 GMC Sierra in the future?
- Regular maintenance of the trailer brake system, checking wiring and connections, and promptly addressing any issues can help prevent the C1118 code from reoccurring.
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