C1118 2017 GMC Sierra Code - Trailer Brake Control Sensitivity Switch Circuit Malfunction
Quick Answer
The C1118 code for a 2017 GMC Sierra relates to a malfunction in the trailer brake control sensitivity switch circuit. Common causes include Faulty sensitivity switch in the trailer brake control system, Wiring issues or short circuits in the sensitivity switch circuit, Corrosion or damage to the electrical connections related to the sensitivity switch. 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 2017 GMC Sierra indicates Trailer Brake Control Sensitivity Switch Circuit Malfunction.
- Common causes
- Common causes include Faulty sensitivity switch in the trailer brake control system, Wiring issues or short circuits in the sensitivity switch circuit, Corrosion or damage to the electrical connections related to the sensitivity switch.
- 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 2017 GMC Sierra Description
The C1118 code for a 2017 GMC Sierra relates to a malfunction in the trailer brake control sensitivity switch circuit. Trailer brake control systems are essential for towing trailers safely, as they help the vehicle apply the brakes on the trailer in coordination with the vehicle's own braking system. When this circuit malfunctions, it can lead to issues with the trailer brake control system, affecting the vehicle's towing capabilities and overall safety.
Common Causes of C1118 2017 GMC Sierra
- Faulty sensitivity switch in the trailer brake control system
- Wiring issues or short circuits in the sensitivity switch circuit
- Corrosion or damage to the electrical connections related to the sensitivity switch
- Issues with the trailer brake control module
- Software or programming issues within the trailer brake control system
Symptoms of C1118 2017 GMC Sierra
- Erratic behavior of trailer brakes
- Reduced braking performance while towing
- Warning light on the dashboard related to trailer brake system
- Inconsistent brake response from the trailer
How to Fix C1118 2017 GMC Sierra
- Diagnose the specific cause of the malfunction using a diagnostic scanner to pinpoint the issue within the trailer brake control system.
- Inspect the sensitivity switch, wiring, and electrical connections for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the trailer brake control system to ensure proper functionality after addressing the issue.
- Clear the diagnostic trouble codes from the vehicle's computer system to reset the system and verify that the repair was successful.
- If the issue persists, consult with a professional mechanic or technician for further troubleshooting and repair.
Cost to Fix C1118 2017 GMC Sierra
The typical repair costs for addressing a trailer brake control sensitivity switch circuit malfunction can vary depending on the specific cause of the issue and the extent of repairs needed. In general, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total cost for resolving this issue can range from $150 to $500. However, it is recommended to consult with local auto repair shops to get a more accurate estimate based on your vehicle's make and model, as well as the severity of the problem. Labor rates at auto repair shops typically range between $80 and $150 per hour, but may vary based on location and shop rates.
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Frequently Asked Questions about C1118 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code C1118 in a 2017 GMC Sierra related to the Trailer Brake Control Sensitivity Switch Circuit Malfunction?
The common symptoms include the trailer brake system not working properly, dashboard warning lights related to the trailer brake system, and potential issues with the trailer's braking performance.
2. What are the possible causes of OBDII code C1118 in a 2017 GMC Sierra?
Possible causes of this code include a faulty sensitivity switch, damaged wiring or connectors in the trailer brake system, issues with the trailer brake controller module, or a malfunction in the vehicle's onboard diagnostic system.
3. How can I diagnose the Trailer Brake Control Sensitivity Switch Circuit Malfunction in my 2017 GMC Sierra?
Diagnosing this issue involves checking the wiring and connectors in the trailer brake system, testing the sensitivity switch for proper functionality, and using a diagnostic scanner to retrieve the specific trouble codes present.
4. Can I still safely tow a trailer with my 2017 GMC Sierra if OBDII code C1118 is triggered?
It is not recommended to tow a trailer if the trailer brake system is not functioning correctly. Ensure the issue is diagnosed and repaired before towing to prevent potential safety hazards.
5. Are there any simple repair tips for fixing OBDII code C1118 in a 2017 GMC Sierra?
Some simple repair tips include checking and tightening the wiring connections in the trailer brake system, replacing a faulty sensitivity switch if needed, and resetting the trouble codes after making repairs.
6. Is it necessary to visit a mechanic for OBDII code C1118 in a 2017 GMC Sierra, or can I fix it myself?
Depending on your level of automotive knowledge and experience, you may be able to diagnose and repair this issue yourself. However, if you are unsure or if the problem persists after basic troubleshooting, it is recommended to seek professional help.
7. Will OBDII code C1118 cause any long-term damage to my 2017 GMC Sierra if left untreated?
Leaving this code untreated can result in potential safety risks while towing a trailer due to the malfunctioning trailer brake system. It is advisable to address this issue promptly to avoid any long-term damage or safety concerns.
8. Can extreme weather conditions affect the sensitivity switch circuit and trigger OBDII code C1118 in a 2017 GMC Sierra?
Extreme weather conditions, such as moisture or corrosion from exposure to salt on the roads, can potentially impact the sensitivity switch circuit and lead to the malfunction triggering this trouble code.
9. How much does it typically cost to repair OBDII code C1118 related to the Trailer Brake Control Sensitivity Switch Circuit Malfunction in a 2017 GMC Sierra?
The cost of repair can vary depending on the specific cause of the issue and whether you choose to fix it yourself or seek professional help. Costs may include parts replacement, labor fees, and diagnostic charges.
10. Are there any recalls or service bulletins related to OBDII code C1118 in a 2017 GMC Sierra?
It is advisable to check with your local GMC dealership or visit the manufacturer's website to see if there are any recalls or service bulletins addressing this specific OBDII code and related issues in your vehicle.
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