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C1116 Chevrolet Code - Manual Trailer Brake Apply Request Signal 1 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
C1116 Chevrolet indicates Manual Trailer Brake Apply Request Signal 1 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 3,243
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Jul 18, 2023
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Code C1116 Chevrolet 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 C1116 Chevrolet - Manual Trailer Brake Apply Request Signal 1 Malfunction - AutoCodes.com
C1116 Chevrolet Code - Manual Trailer Brake Apply Request Signal 1 Malfunction
What does this mean?

What are the Possible Causes of the DTC C1116 Chevrolet?

  • 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 C1116 Chevrolet?

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 C1116 Chevrolet 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 C1116 Chevrolet code?

Need more information on how to fix the C1116 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1116 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

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 C1116 Chevrolet Code

1. What does the OBDII code C1116 mean for a Chevrolet?

C1116 indicates a malfunction in the Manual Trailer Brake Apply Request Signal 1 circuit, which is part of the trailer brake control system.

2. What are the common symptoms of code C1116 in a Chevrolet?

Symptoms may include the trailer brakes not responding, a trailer brake warning light on the dashboard, or reduced braking performance when towing.

3. What causes the C1116 code to appear in a Chevrolet?

Common causes include damaged or corroded wiring, a faulty trailer brake control switch, a defective trailer brake control module, or poor electrical connections.

4. Can I still drive my Chevrolet with a C1116 code?

Yes, but towing a trailer may be unsafe since the trailer brakes might not function properly. Address the issue before towing.

5. How do I diagnose the C1116 code in my Chevrolet?

Use an OBDII scanner to confirm the code, check wiring and connectors for damage or corrosion, and test the trailer brake control switch and module for proper operation.

6. Is the C1116 code specific to towing a trailer?

Yes, this code pertains to the trailer brake system and will typically only appear when the system detects an issue with manual trailer brake operation.

7. How can I fix the C1116 code on my Chevrolet?

Inspect and repair any damaged wiring or connectors, replace the trailer brake control switch if faulty, or replace the brake control module if necessary.

8. How much does it cost to repair a C1116 code in a Chevrolet?

Repair costs vary but may range from $50 for simple wiring repairs to $500 or more if the trailer brake control module needs replacement.

9. Can a faulty trailer brake control module cause the C1116 code?

Yes, a malfunctioning trailer brake control module is a potential cause of this code and should be tested during diagnosis.

10. Will clearing the C1116 code fix the problem?

Clearing the code may turn off the warning temporarily, but the issue will likely return unless the underlying problem is resolved.

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