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Engine-Codes – Ford – C111B Ford

C111B Ford Code - Left Stop Lamp Circuit

Quick Answer

The C111B Ford code refers to an issue with the Left Stop Lamp Circuit in the vehicle. Common causes include Faulty left stop lamp bulb, Wiring harness issues, Corrosion or damage to the connections in the left stop lamp circuit. 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
C111B Ford indicates Left Stop Lamp Circuit.
Common causes
Common causes include Faulty left stop lamp bulb, Wiring harness issues, Corrosion or damage to the connections in the left stop lamp circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code C111B Ford Description

The C111B Ford code refers to an issue with the Left Stop Lamp Circuit in the vehicle. This code indicates that there is a problem with the circuit responsible for the left stop lamp, which is a crucial component for signaling to other drivers when the vehicle is braking. When this circuit malfunctions, it can lead to issues with the brake lights not functioning properly, potentially causing safety concerns on the road. The stop lamp circuit is part of the vehicle's lighting system and is essential for ensuring that the vehicle is visible to other drivers, especially in low light conditions or during braking.

OBDII Code C111B Ford - Left Stop Lamp Circuit
C111B Ford Code - Left Stop Lamp Circuit

Common Causes of C111B Ford

  1. Faulty left stop lamp bulb
  2. Wiring harness issues
  3. Corrosion or damage to the connections in the left stop lamp circuit
  4. Defective stop lamp switch
  5. Faulty body control module (BCM)

Symptoms of C111B Ford

  1. Left brake light not working
  2. Rapid blinking of the left brake light
  3. Dashboard warning light indicating an issue with the left stop lamp
  4. Dim or flickering left brake light
  5. Fuse for the left stop lamp circuit blowing repeatedly

How to Fix C111B Ford

  1. Check the left stop lamp bulb and replace if necessary.
  2. Inspect the wiring harness for any damage or corrosion and repair as needed.
  3. Test the connections in the left stop lamp circuit for proper functionality.
  4. Check and replace the stop lamp switch if faulty.
  5. If the issue persists, diagnose the body control module for any malfunctions and replace if necessary.

Cost to Fix C111B Ford

The cost of repairing the Left Stop Lamp Circuit issue can vary depending on the specific cause of the problem. In general, replacing a bulb or repairing wiring issues may cost between $50 to $100. If more extensive repairs are needed, such as replacing the body control module, the cost could range from $200 to $500 or more. It's important to factor in the diagnosis time and labor rates at auto repair shops, which can vary based on location and other factors. It's recommended to consult with a professional technician to get an accurate estimate for the repair.

What does this mean?

Tech Notes for C111B Ford

C111B:11 Left Stop Lamp: Circuit Short to Ground
C111B:15 Left Stop Lamp: Circuit Short to Battery or Open

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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 C111B Ford Code

1. What are common symptoms of OBDII code C111B Ford (Left Stop Lamp Circuit)?

When this code is triggered, common symptoms may include the left stop lamp not working, the brake light staying on constantly, or a warning light illuminated on the dashboard.

2. What are some possible causes of OBDII code C111B Ford?

Possible causes of this code include a faulty left stop lamp bulb, a damaged wiring harness, a defective stop lamp switch, or a problem with the vehicle's body control module.

3. How can I diagnose the issue related to OBDII code C111B Ford?

To diagnose the problem, start by checking the left stop lamp bulb for any signs of damage or burnout. Next, inspect the wiring harness for any loose connections or frayed wires. Finally, test the stop lamp switch and the body control module for proper functionality.

4. Can I repair OBDII code C111B Ford on my own?

If you are comfortable working with automotive electrical systems, you may be able to repair this issue on your own by replacing the faulty left stop lamp bulb, repairing any damaged wiring, or adjusting the stop lamp switch. However, if you are unsure, it is recommended to seek professional assistance.

5. Is it safe to continue driving with OBDII code C111B Ford active?

It is not recommended to continue driving with this code active, as it indicates a problem with the left stop lamp circuit, which is a crucial safety feature. Driving with malfunctioning brake lights can increase the risk of accidents, so it is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code C111B Ford?

The cost of repairing this code can vary depending on the specific cause of the issue and whether you perform the repairs yourself or take your vehicle to a mechanic. Costs may range from a few dollars for a new bulb to a couple of hundred dollars for more extensive repairs.

7. Can extreme weather conditions affect OBDII code C111B Ford?

Yes, extreme weather conditions such as heavy rain or extreme cold can potentially cause issues with the left stop lamp circuit, leading to the triggering of OBDII code C111B Ford. It is important to keep the vehicle's exterior lighting components well-maintained to prevent weather-related damage.

8. Will resetting the OBDII code C111B Ford make the issue go away permanently?

Resetting the code may temporarily turn off the warning light on the dashboard, but if the underlying issue causing OBDII code C111B Ford is not addressed and repaired, the code is likely to reoccur. It is crucial to diagnose and fix the root cause of the problem for a permanent solution.

9. Can a bad fuse cause OBDII code C111B Ford?

Yes, a blown fuse in the left stop lamp circuit can potentially trigger OBDII code C111B Ford. It is advisable to check the fuses related to the stop lamp circuit as part of the diagnostic process when troubleshooting this code.

10. How can I prevent OBDII code C111B Ford from recurring in the future?

To prevent the recurrence of this code, it is important to regularly inspect and maintain the vehicle's lighting system, including the stop lamps, wiring, and switches. Promptly replacing any faulty components and addressing any issues as they arise can help prevent OBDII code C111B Ford from reoccurring.

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