AutoCodes – Cadillac – B0286 Cadillac

B0286 Cadillac Code - Electric Rear Defrost Circuit High

Quick Answer

The Liftgate Module (LGM) monitors the voltage level on the supply voltage circuit of the rear window defogger. Common causes include Faulty Liftgate Module (LGM), Liftgate Module (LGM) harness is open or shorted, Liftgate Module (LGM) circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0286 Cadillac indicates Electric Rear Defrost Circuit High.
Common causes: Common causes include Faulty Liftgate Module (LGM), Liftgate Module (LGM) harness is open or shorted, Liftgate Module (LGM) circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 797

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B0286 Cadillac Description

The Liftgate Module (LGM) monitors the voltage level on the supply voltage circuit of the rear window defogger. The LGM test the supply voltage circuit of the rear window defogger every 160 milliseconds. With the rear window defogger inactive, the supply voltage circuit of the rear window defogger will have no voltage present. With the rear window defogger active, the supply voltage circuit of the rear window defogger will be near system voltage.

OBDII Code B0286 Cadillac - Electric Rear Defrost Circuit High - AutoCodes.com — B0286 Cadillac Code - Electric Rear Defrost Circuit High

What does this mean?

What are the Possible Causes of the DTC B0286 Cadillac?

Faulty Liftgate Module (LGM)
Liftgate Module (LGM) harness is open or shorted
Liftgate Module (LGM) circuit poor electrical connection

How to Fix the DTC B0286 Cadillac?

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 B0286 Cadillac 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 B0286 Cadillac code?

Need more information on how to fix the B0286 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0286 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 B0286 Cadillac Code

1. What are the common symptoms of OBDII code B0286 in a Cadillac related to the Electric Rear Defrost Circuit High?

- Common symptoms may include the rear defroster not functioning properly, rear window not clearing frost or condensation, and a warning light on the dashboard.

2. What are the possible causes of OBDII code B0286 in a Cadillac for the Electric Rear Defrost Circuit High?

- Possible causes may include a faulty rear defrost relay, damaged wiring or connectors in the defrost circuit, or a malfunctioning rear defrost switch.

3. How can I diagnose OBDII code B0286 in a Cadillac for the Electric Rear Defrost Circuit High?

- Diagnosis involves checking the rear defrost relay, inspecting the wiring and connectors for damage, and testing the rear defrost switch for proper functionality using a multimeter.

4. Can I continue driving my Cadillac with OBDII code B0286 related to the Electric Rear Defrost Circuit High?

- It is generally safe to continue driving, but it is recommended to address the issue promptly to ensure proper rear defrost functionality, especially in cold or humid conditions.

5. How can I repair OBDII code B0286 in a Cadillac for the Electric Rear Defrost Circuit High?

- Repair involves replacing a faulty rear defrost relay, repairing or replacing damaged wiring or connectors, or replacing a malfunctioning rear defrost switch as needed.

6. Are there any simple troubleshooting steps I can take for OBDII code B0286 in a Cadillac for the Electric Rear Defrost Circuit High?

- You can start by checking the rear defrost fuse, ensuring the rear defrost switch is operational, and visually inspecting the defrost wiring and connectors for any obvious damage.

7. Does OBDII code B0286 in a Cadillac for the Electric Rear Defrost Circuit High affect the vehicle's overall performance?

- This code typically does not affect the vehicle's overall performance but can impact visibility through the rear window in certain weather conditions.

8. Can weather conditions impact the triggering of OBDII code B0286 in a Cadillac for the Electric Rear Defrost Circuit High?

- Yes, extreme cold or humid conditions can exacerbate issues related to the rear defrost circuit, potentially triggering the code due to increased demand on the system.

9. Is it possible to reset OBDII code B0286 in a Cadillac for the Electric Rear Defrost Circuit High without fixing the underlying issue?

- While you can clear the code temporarily, it is recommended to address the root cause to prevent recurring issues with the rear defrost system.

10. How can I prevent OBDII code B0286 from recurring in my Cadillac for the Electric Rear Defrost Circuit High in the future?

- Regularly inspect and maintain the rear defrost system components, address any wiring or switch issues promptly, and avoid overloading the rear defrost circuit to prevent future occurrences of the code.