AutoCodes – Chevrolet – B0286 Chevrolet

B0286 Chevrolet 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 Chevrolet 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.

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Code Popularity 2,041

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

What does this mean?

What are the Possible Causes of the DTC B0286 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the B0286 Chevrolet 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 Chevrolet Code

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

- Common symptoms include the rear defrost not working, rear defrost indicator light staying on, or a visible issue with the rear defrost grid.

2. What are the possible causes of OBDII code B0286 in a Chevrolet?

- Possible causes include a faulty rear defrost relay, damaged rear defrost grid, issues with the rear defrost switch, or wiring problems.

3. How can I diagnose the Electric Rear Defrost Circuit High issue in my Chevrolet?

- You can start by visually inspecting the rear defrost grid for damage, checking the rear defrost relay, and testing the rear defrost switch for proper functionality using a multimeter.

4. Can a blown fuse cause the OBDII code B0286 in a Chevrolet?

- Yes, a blown fuse related to the rear defrost circuit can also trigger the B0286 code in a Chevrolet.

5. What are some repair tips for fixing the Electric Rear Defrost Circuit High issue in a Chevrolet?

- Repair tips include checking and replacing blown fuses, repairing any damaged rear defrost grid, testing and replacing faulty relays, and ensuring proper wiring connections.

6. Is it safe to drive with the OBDII code B0286 in a Chevrolet?

- While the issue may not affect the overall drivability of the vehicle, it is recommended to address the problem promptly to ensure proper functioning of the rear defrost system.

7. Can weather conditions impact the Electric Rear Defrost Circuit High problem in a Chevrolet?

- Extreme weather conditions, such as freezing temperatures or heavy snowfall, can exacerbate issues related to the rear defrost system and trigger the B0286 code.

8. How long does it typically take to repair the Electric Rear Defrost Circuit High issue in a Chevrolet?

- The repair time can vary depending on the exact cause of the problem, but simple fixes like replacing a fuse or relay can be done relatively quickly, while more complex issues may take longer.

9. Are there any preventive measures to avoid encountering the OBDII code B0286 in a Chevrolet?

- Regularly inspecting the rear defrost system, avoiding using excessive force when clearing ice from the rear window, and addressing any minor issues promptly can help prevent the B0286 code from appearing.

10. Can the OBDII code B0286 in a Chevrolet be reset after the issue is fixed?

- Yes, once the underlying issue causing the B0286 code is resolved, the code can be cleared using an OBDII scanner to reset the system.