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Engine-Codes – Lincoln – B112D Lincoln

B112D Lincoln Code - Rear Window Defrost LED Circuit

Quick Answer

The B112D diagnostic trouble code for Lincoln vehicles specifically refers to an issue with the rear window defrost LED circuit. Common causes include Faulty wiring harness, Blown fuse, Defective rear window defrost switch. 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
B112D Lincoln indicates Rear Window Defrost LED Circuit.
Common causes
Common causes include Faulty wiring harness, Blown fuse, Defective rear window defrost switch.
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 Sep 14, 2024
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Code B112D Lincoln Description

The B112D diagnostic trouble code for Lincoln vehicles specifically refers to an issue with the rear window defrost LED circuit. This code indicates that there is a malfunction in the circuit responsible for powering the rear window defroster LED indicator light on the dashboard. The rear window defroster is a crucial component for maintaining visibility in cold or humid conditions by removing frost, ice, or condensation from the rear window.

OBDII Code B112D Lincoln - Rear Window Defrost LED Circuit
B112D Lincoln Code - Rear Window Defrost LED Circuit

Common Causes of B112D Lincoln

  1. Faulty wiring harness
  2. Blown fuse
  3. Defective rear window defrost switch
  4. Malfunctioning rear window defroster grid
  5. Issue with the LED indicator light

Symptoms of B112D Lincoln

  1. Rear window defroster not working
  2. Rear window defroster indicator light not illuminating
  3. Frost, ice, or condensation not clearing from the rear window
  4. Electrical burning smell in the vehicle

How to Fix B112D Lincoln

  1. Begin by conducting a visual inspection of the rear window defroster system, checking for any visible damage or loose connections.
  2. Test the rear window defroster switch and the LED indicator light to determine if they are functioning correctly.
  3. Use a multimeter to test the continuity of the wiring harness and the rear window defroster grid.
  4. Replace any faulty components such as the switch, fuse, wiring harness, or LED indicator light as needed.
  5. Test the rear window defroster system to ensure that the issue has been resolved and the LED indicator light is working properly.

Cost to Fix B112D Lincoln

The cost of repairing the B112D code for the rear window defrost LED circuit can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair costs for this type of issue can range from $100 to $300. However, it's important to note that labor rates at auto repair shops can vary significantly, so it's recommended to obtain quotes from multiple shops to get a more accurate estimate. Additionally, the cost of parts such as the rear window defroster switch, wiring harness, or LED indicator light will also impact the total repair cost.

What does this mean?

Tech Notes for B112D Lincoln

B112D:11 Rear Window Defrost LED Circuit Short to Ground

B112D:15 Rear Window Defrost LED 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 B112D Lincoln Code

1. What are the common symptoms of OBDII code B112D in a Lincoln related to the Rear Window Defrost LED Circuit?

- Common symptoms include the rear window defrost LED not illuminating, the rear defroster not working, and a possible illuminated dashboard warning light.

2. What are the possible causes of the B112D OBDII code in a Lincoln indicating a fault in the Rear Window Defrost LED Circuit?

- The code B112D can be triggered by issues such as a faulty rear window defrost switch, damaged wiring or connectors, a blown fuse, or a malfunctioning rear window defrost module.

3. How can I diagnose the B112D code related to the Lincoln's Rear Window Defrost LED Circuit?

- To diagnose the issue, start by checking the rear window defrost switch, inspecting the wiring for any damage, testing the fuse related to the defroster circuit, and verifying the functionality of the rear window defrost module.

4. Is it safe to continue driving a Lincoln with the B112D OBDII code indicating a problem with the Rear Window Defrost LED Circuit?

- While the vehicle can still be driven with this code, it is recommended to address the issue promptly to ensure proper functionality of the rear window defroster, especially in cold or rainy weather conditions.

5. How can I repair the B112D OBDII code in a Lincoln associated with the Rear Window Defrost LED Circuit?

- Repair steps may involve replacing a faulty rear window defrost switch, repairing damaged wiring or connectors, replacing a blown fuse, or installing a new rear window defrost module as needed.

6. Can resetting the OBDII system clear the B112D code linked to the Lincoln's Rear Window Defrost LED Circuit?

- Resetting the OBDII system may temporarily clear the code, but it is crucial to address the underlying issue causing the fault in the Rear Window Defrost LED Circuit to prevent the code from reappearing.

7. Are there any specific tips for maintaining the Rear Window Defrost LED Circuit in a Lincoln to prevent the B112D OBDII code from occurring?

- Regularly inspect and test the rear window defrost system, avoid using abrasive cleaners on the rear window, and ensure proper care when operating the rear defroster to maintain the circuit's functionality and prevent faults.

8. Can extreme weather conditions affect the occurrence of the B112D OBDII code related to the Lincoln's Rear Window Defrost LED Circuit?

- Yes, extreme cold or wet weather conditions can potentially exacerbate issues with the rear window defrost system, leading to the triggering of the B112D code due to increased stress on the circuit.

9. Should I seek professional help to diagnose and repair the B112D OBDII code in a Lincoln concerning the Rear Window Defrost LED Circuit?

- If you are not confident in diagnosing or repairing electrical issues, it is advisable to seek the assistance of a qualified mechanic or automotive technician to properly address the B112D code and ensure the rear window defrost system functions correctly.

10. Can a malfunctioning Rear Window Defrost LED Circuit in a Lincoln impact other vehicle systems or components?

- While the primary impact is on the rear window defrost system, a fault in the Rear Window Defrost LED Circuit can potentially affect other electrical systems or components in the vehicle, highlighting the importance of timely diagnosis and repair.

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