C1118 2016 GMC Sierra Code - Trailer Brake Control Sensitivity Switch Circuit Malfunction
Quick Answer
The C1118 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a Trailer Brake Control Sensitivity Switch Circuit Malfunction. Common causes include Faulty sensitivity switch within the trailer brake control system, Electrical wiring issues or shorts in the sensitivity switch circuit, Sensor malfunction affecting the sensitivity switch operation. 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 2016 GMC Sierra indicates Trailer Brake Control Sensitivity Switch Circuit Malfunction.
- Common causes
- Common causes include Faulty sensitivity switch within the trailer brake control system, Electrical wiring issues or shorts in the sensitivity switch circuit, Sensor malfunction affecting the sensitivity switch operation.
- 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 C1118 2016 GMC Sierra Description
The C1118 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a Trailer Brake Control Sensitivity Switch Circuit Malfunction. This code specifically relates to an issue with the sensitivity switch circuit of the trailer brake control system in the vehicle. The trailer brake control system is responsible for controlling the braking of a trailer being towed by the vehicle. The sensitivity switch circuit is a crucial component that helps adjust the braking sensitivity based on the weight of the trailer and the braking requirements.
Common Causes of C1118 2016 GMC Sierra
- Faulty sensitivity switch within the trailer brake control system.
- Electrical wiring issues or shorts in the sensitivity switch circuit.
- Sensor malfunction affecting the sensitivity switch operation.
- Corrosion or damage to the connectors or terminals in the trailer brake control system.
- Software glitches or programming errors in the vehicle's onboard computer related to the trailer brake control system.
Symptoms of C1118 2016 GMC Sierra
- Inaccurate or delayed trailer brake response when towing a trailer.
- ABS warning light illuminated on the dashboard.
- Uneven braking performance between the vehicle and the trailer.
- Increased stopping distance when towing a trailer.
- Difficulty maintaining control of the vehicle and trailer during braking maneuvers.
How to Fix C1118 2016 GMC Sierra
- Begin by conducting a thorough inspection of the trailer brake control system, focusing on the sensitivity switch circuit.
- Test the sensitivity switch for proper operation and responsiveness to input signals.
- Check the electrical wiring, connectors, and terminals for any signs of damage, corrosion, or loose connections.
- Replace the sensitivity switch if it is found to be faulty or malfunctioning.
- Clear the DTC from the vehicle's onboard computer using a diagnostic scanner and perform a test drive to ensure proper trailer brake control functionality.
Cost to Fix C1118 2016 GMC Sierra
The typical repair costs for addressing a Trailer Brake Control Sensitivity Switch Circuit Malfunction (C1118) in a 2016 GMC Sierra can vary depending on the extent of the issue and the specific components that need to be replaced. On average, the parts required for this repair may range from $50 to $200, while the labor costs can range from $100 to $300. Overall, the total repair cost for this issue could fall within the range of $150 to $500, including parts and labor.
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Frequently Asked Questions about C1118 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code C1118 in a 2016 GMC Sierra related to the Trailer Brake Control Sensitivity Switch Circuit Malfunction?
The common symptoms include erratic trailer brake activation, inconsistent trailer braking response, and the trailer brake system not functioning properly.
2. What are the possible causes of OBDII code C1118 in a 2016 GMC Sierra?
Possible causes of this code may include a faulty sensitivity switch, damaged wiring or connectors in the trailer brake control system, or a malfunctioning trailer brake control module.
3. How can I diagnose the Trailer Brake Control Sensitivity Switch Circuit Malfunction in my 2016 GMC Sierra?
Diagnosing this issue usually involves checking the sensitivity switch for proper function, inspecting the wiring and connectors for any damage, and using an OBDII scanner to retrieve the specific trouble code.
4. Can I still safely drive my 2016 GMC Sierra with OBDII code C1118 related to the Trailer Brake Control Sensitivity Switch Circuit Malfunction?
It is not recommended to drive the vehicle with this code active, as it may affect the proper functioning of the trailer brake system, potentially leading to unsafe towing conditions.
5. How can I repair OBDII code C1118 in my 2016 GMC Sierra?
Repairing this code typically involves replacing the faulty sensitivity switch, repairing any damaged wiring or connectors, or resetting the trailer brake control module to rectify the circuit malfunction.
6. Are there any DIY tips for fixing OBDII code C1118 in a 2016 GMC Sierra?
While some basic troubleshooting like checking connections and fuses can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for a comprehensive diagnosis and repair of this issue.
7. Will resetting the OBDII code C1118 in my 2016 GMC Sierra make it go away permanently?
Resetting the code may clear it temporarily, but if the underlying issue causing the Trailer Brake Control Sensitivity Switch Circuit Malfunction is not addressed, the code is likely to reappear.
8. Can extreme weather conditions affect the triggering of OBDII code C1118 in a 2016 GMC Sierra?
Extreme weather conditions, especially moisture and corrosion, can potentially impact the trailer brake control system components and lead to the malfunction indicated by code C1118.
9. How can regular maintenance help prevent OBDII code C1118 in a 2016 GMC Sierra?
Regularly inspecting and maintaining the trailer brake control system, including the sensitivity switch and wiring, can help prevent issues that may trigger code C1118, ensuring proper trailer brake function.
10. Is it necessary to get the Trailer Brake Control Sensitivity Switch Circuit Malfunction fixed immediately in my 2016 GMC Sierra?
It is advisable to address this issue promptly to ensure the safe operation of the trailer brake system and prevent any potential towing-related safety hazards.
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