C1118 2016 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 2016 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 2016 GMC Sierra Description
What are the Possible Causes of the DTC C1118 2016 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 2016 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 2016 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 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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