AutoCodes – Generic – C111A

C111A Code - Right Stop Lamp Circuit

Quick Answer

The Body Control Module (BCM) monitors the Right Stop Lamp. Common causes include Faulty Right Stop Lamp, Right Stop Lamp harness is open or shorted, Right Stop Lamp 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: C111A indicates Right Stop Lamp Circuit.
Common causes: Common causes include Faulty Right Stop Lamp, Right Stop Lamp harness is open or shorted, Right Stop Lamp 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 9,894

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 19, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C111A Description

The Body Control Module (BCM) monitors the Right Stop Lamp. The Diagnostic Trouble Code (DTC) will be set when the Body Control Module detects that the Right Stop Lamp circuit is not to factory specifications.

OBDII Code C111A - Right Stop Lamp Circuit - AutoCodes.com — C111A Code - Right Stop Lamp Circuit

What does this mean?

What are the Possible Causes of the DTC C111A?

Faulty Right Stop Lamp
Right Stop Lamp harness is open or shorted
Right Stop Lamp circuit poor electrical connection
Faulty Stop Lamp Switch
Faulty Body Control Module (BCM)

How to Fix the DTC C111A?

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 does this mean?

Code Tech Notes

C111A:11 Right Stop Lamp Circuit Short to Ground
C111A:15 Right Stop Lamp Circuit Short to Battery or Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C111A 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 C111A code?

Need more information on how to fix the C111A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C111A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C111A Buick — Trailer Brake Power Control Module
C111A Cadillac — Trailer Brake Power Control Module
C111A Chevrolet — Trailer Brake Power Control Module
C111A Ford — Right Stop Lamp Circuit
C111A GMC — Trailer Brake Power Control Module
C111A Lincoln — Right Stop Lamp Circuit
C111A Mercury — Right Stop Lamp Circuit

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 C111A Code

1. What are the common symptoms of OBDII code C111A (Right Stop Lamp Circuit)?

- The common symptoms of OBDII code C111A include a non-functioning right stop lamp, brake light warning on the dashboard, or flickering brake lights.

2. What are the possible causes of OBDII code C111A?

- Possible causes of OBDII code C111A can include a faulty brake light bulb, damaged wiring or connectors in the right stop lamp circuit, or a malfunctioning brake light switch.

3. How can I diagnose OBDII code C111A?

- To diagnose OBDII code C111A, start by visually inspecting the right stop lamp and its wiring for any visible damage. Use a multimeter to test the continuity of the wiring and check the brake light switch for proper operation.

4. How can I repair OBDII code C111A?

- Repairing OBDII code C111A may involve replacing a faulty brake light bulb, repairing damaged wiring or connectors, or adjusting/replacing the brake light switch as needed.

5. Can OBDII code C111A cause any safety concerns?

- Yes, OBDII code C111A can pose safety concerns as it indicates issues with the right stop lamp circuit, potentially leading to reduced visibility of your vehicle to other drivers when braking.

6. Is it safe to continue driving with OBDII code C111A present?

- It is not recommended to continue driving with OBDII code C111A present, as it can compromise the effectiveness of your vehicle's brake lights and increase the risk of accidents or collisions.

7. How much does it typically cost to repair OBDII code C111A?

- The cost to repair OBDII code C111A can vary depending on the specific cause of the issue, but it generally ranges from $50 to $200 for parts and labor.

8. Can OBDII code C111A be triggered by a loose connection in the right stop lamp circuit?

- Yes, a loose or poor connection in the right stop lamp circuit can trigger OBDII code C111A due to disrupted electrical flow to the brake light.

9. Will resetting the OBDII system clear the C111A code?

- Resetting the OBDII system may temporarily clear the C111A code, but if the underlying issue causing the code is not addressed, it is likely to reappear after driving your vehicle.

10. Are there any preventive measures I can take to avoid OBDII code C111A in the future?

- Regularly inspecting and maintaining your vehicle's brake lights, wiring, and brake light switch can help prevent OBDII code C111A from occurring in the future.