AutoCodes – Chevrolet – C1117 2018 Chevrolet Silverado

C1117 2018 Chevrolet Silverado Code - Manual Trailer Brake Apply Request Signal 2 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: C1117 2018 Chevrolet Silverado indicates Manual Trailer Brake Apply Request Signal 2 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.

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Code Popularity 397

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 18, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1117 2018 Chevrolet Silverado Description

The trailer brake control system has a control panel with the trailer gain and manual apply switches. The switches are located on the instrument panel to the left of the steering column. The control panel and switches allow you to adjust the amount of output, referred to as trailer gain, available to the electric trailer brakes and allow you to manually apply the trailer brakes. The trailer brake control panel and switches are used along with the trailer brake display page on the driver information center to adjust and display power output to the trailer brakes.

OBDII Code C1117 2018 Chevrolet Silverado - Manual Trailer Brake Apply Request Signal 2 Malfunction - AutoCodes.com — C1117 2018 Chevrolet Silverado Code - Manual Trailer Brake Apply Request Signal 2 Malfunction

What does this mean?

What are the Possible Causes of the DTC C1117 2018 Chevrolet Silverado?

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 C1117 2018 Chevrolet Silverado?

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 C1117 2018 Chevrolet Silverado 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.

Need more information about the C1117 2018 Chevrolet Silverado code?

Need more information on how to fix the C1117 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1117 2018 Chevrolet Silverado Code

What does the OBDII code C1117 mean for a 2018 Chevrolet Silverado?

C1117 indicates a malfunction in the Manual Trailer Brake Apply Request Signal 2, which means there is an issue with the signal sent from the manual brake controller to the vehicle's brake system.

What are the common symptoms associated with the C1117 code?

Common symptoms may include warning lights on the dashboard, reduced braking performance when towing a trailer, or the manual trailer brakes not functioning properly.

What could cause the C1117 code to trigger?

Possible causes include a faulty brake controller, damaged wiring or connectors, poor ground connections, or issues with the vehicle's electronic control module (ECM).

How can I diagnose the C1117 code?

Start by checking the wiring and connectors related to the trailer brake controller for any damage or corrosion. You can also use a diagnostic scanner to check for additional codes that may provide more context.

What are some repair tips for fixing the C1117 code?

Repair tips include inspecting and repairing any damaged wiring, ensuring all connections are clean and secure, and replacing the brake controller if itâ€™s found to be faulty.

Can I continue to drive my Silverado with the C1117 code?

While it may still be drivable, it is not advisable to tow a trailer until the issue is resolved, as it could lead to unsafe braking conditions.

Will clearing the C1117 code fix the problem?

Clearing the code may temporarily turn off the warning light, but it will not fix the underlying issue. The problem will likely reoccur if not addressed.

Can I fix the C1117 code myself?

If you have experience with automotive electrical systems, you may be able to diagnose and repair the issue yourself. However, if you are unsure, it is best to consult a professional mechanic.

What should I do if the C1117 code keeps returning after repairs?

If the code returns after repairs, further diagnostics may be needed to identify any additional underlying issues, such as ECM problems or intermittent wiring faults.