C1116 Buick 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 Buick 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.
Code C1116 Buick Description
What are the Possible Causes of the DTC C1116 Buick?
- 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 Buick?
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 Buick 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 C1116 Buick Code
1. What does the OBDII code C1116 mean for a Buick?
C1116 indicates a malfunction in the Manual Trailer Brake Apply Request Signal 1, which is part of the trailer brake control system.
2. What are common symptoms of the C1116 code on a Buick?
Symptoms may include the trailer brakes not responding properly, a warning light on the dash, or issues with trailer brake application during manual operation.
3. What causes the C1116 code to appear?
Common causes include faulty wiring or connections in the trailer brake system, a defective trailer brake control module, or a malfunctioning manual brake apply switch.
4. Can a loose trailer brake wiring harness cause the C1116 code?
Yes, a loose or damaged wiring harness can disrupt the signal and trigger the C1116 code.
5. How do you fix the C1116 code on a Buick?
Repairs may involve inspecting and repairing wiring and connectors, replacing the manual brake apply switch, or reprogramming or replacing the trailer brake control module if necessary.
6. Can driving with the C1116 code damage my vehicle?
While it may not directly damage the vehicle, the trailer brake system may not function properly, posing a safety hazard when towing.
7. How do you diagnose the cause of the C1116 code?
A mechanic will typically use a scan tool to check the code, inspect the trailer brake wiring, test the manual brake apply switch, and verify the module's functionality.
8. Is the C1116 code related to trailer brake functionality only?
Yes, this code specifically pertains to the manual trailer brake apply signal and does not affect other vehicle systems.
9. Can a faulty trailer brake control module trigger the C1116 code?
Yes, a defective trailer brake control module is one potential cause of the C1116 code.
10. Do I need to recalibrate the trailer brake system after fixing the C1116 code?
In some cases, recalibration or reprogramming of the trailer brake control module may be necessary after repairs.
Discuss the causes and fixes for C1116 Buick OBDII Code
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