C1118 2014 GMC Sierra Code - Trailer Brake Control Sensitivity Switch Circuit Malfunction
Quick Answer
The C1118 diagnostic trouble code (DTC) is specific to the 2014 GMC Sierra and indicates a Trailer Brake Control Sensitivity Switch Circuit Malfunction. Common causes include Faulty sensitivity switch, Wiring issues or shorts in the trailer brake control circuit, Corrosion or damage to the connectors in the trailer brake system. 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 sensitivity switch, Wiring issues or shorts in the trailer brake control circuit, Corrosion or damage to the connectors in the trailer brake system.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code C1118 2014 GMC Sierra Description
The C1118 diagnostic trouble code (DTC) is specific to the 2014 GMC Sierra and indicates a Trailer Brake Control Sensitivity Switch Circuit Malfunction. This code is related to the trailer brake control system in the vehicle, which is responsible for applying the brakes on a trailer when the driver presses the brake pedal in the truck. The sensitivity switch is a crucial component of this system, as it adjusts how aggressively the trailer brakes are applied based on the driver's input.
Common Causes of C1118 2014 GMC Sierra
- Faulty sensitivity switch
- Wiring issues or shorts in the trailer brake control circuit
- Corrosion or damage to the connectors in the trailer brake system
- Malfunctioning trailer brake control module
- Issues with the brake fluid pressure sensor
Symptoms of C1118 2014 GMC Sierra
- Uneven braking when towing a trailer
- Delayed response from trailer brakes
- Complete failure of trailer brakes
- Illumination of the ABS warning light on the dashboard
- Increased stopping distance when towing a trailer
How to Fix C1118 2014 GMC Sierra
- Begin by conducting a thorough inspection of the trailer brake control system, including the sensitivity switch and wiring.
- Test the sensitivity switch with a multimeter to determine if it is functioning correctly.
- Check for any loose or damaged wiring connections and repair or replace them as needed.
- Inspect the trailer brake control module for any signs of damage or malfunction and replace if necessary.
- Clear the DTC from the vehicle's computer and test the trailer brake system to ensure proper function.
Cost to Fix C1118 2014 GMC Sierra
The cost of repairing a Trailer Brake Control Sensitivity Switch Circuit Malfunction can vary depending on the extent of the issue and the specific components that need to be replaced. On average, the parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. In total, you can expect to pay anywhere from $150 to $500 for this repair, depending on the shop's labor rates and any additional services required. It's recommended to consult with a professional mechanic to get an accurate estimate for your specific vehicle and location.
Need more information about the C1118 2014 GMC Sierra code?
Need more information on how to fix the C1118 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C1118 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
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.
Discuss the causes and fixes for C1118 2014 GMC Sierra OBDII Code
Code C1118 2014 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.