AutoCodes – Chevrolet – B0283 Chevrolet

B0283 Chevrolet Code - Electric Rear Defrost Circuit Malfunction

Quick Answer

When the rear heated rear window switch is pressed and the engine is running, the rear window defogger grid will activate and will turn off automatically depending upon the vehicle's speed. Common causes include Faulty Rear Defogger Relay, Rear Defogger Relay harness is open or shorted, Rear Defogger Relay 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: B0283 Chevrolet indicates Electric Rear Defrost Circuit Malfunction.
Common causes: Common causes include Faulty Rear Defogger Relay, Rear Defogger Relay harness is open or shorted, Rear Defogger Relay 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 10,675

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 Nov 12, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0283 Chevrolet Description

When the rear heated rear window switch is pressed and the engine is running, the rear window defogger grid will activate and will turn off automatically depending upon the vehicle's speed. The Heating, Ventilation, and Air Conditioning (HVAC) Control Module monitors the voltage level on the supply voltage circuit of the rear window defogger. The HVAC tests 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 the system voltage.

OBDII Code B0283 Chevrolet - Electric Rear Defrost Circuit Malfunction - AutoCodes.com — B0283 Chevrolet Code - Electric Rear Defrost Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B0283 Chevrolet?

Faulty Rear Defogger Relay
Rear Defogger Relay harness is open or shorted
Rear Defogger Relay circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0283 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 B0283 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 B0283 Chevrolet code?

Need more information on how to fix the B0283 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0283 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

B0283 2014 Chevrolet Silverado — Electric Rear Defrost Circuit Malfunction
B0283 2015 Chevrolet Silverado — Electric Rear Defrost Circuit Malfunction
B0283 2016 Chevrolet Silverado — Electric Rear Defrost Circuit Malfunction
B0283 2017 Chevrolet Silverado — Electric Rear Defrost Circuit Malfunction
B0283 2018 Chevrolet Silverado — Electric Rear Defrost Circuit Malfunction

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 B0283 Chevrolet Code

1. What does OBDII code B0283 mean on a Chevrolet vehicle?

Code B0283 indicates an issue with the Electric Rear Defrost Circuit, which may prevent the rear defroster from functioning properly.

2. What are the common symptoms of code B0283 in a Chevrolet?

Symptoms include the rear defroster not working, foggy or frosted rear windows that donâ€™t clear, and possibly an illuminated warning light on the dashboard.

3. What causes the B0283 code to appear in a Chevrolet?

Common causes include a blown fuse, damaged defrost grid on the rear window, faulty wiring or connectors, or a malfunctioning rear defrost relay or switch.

4. Can a blown fuse cause the B0283 Electric Rear Defrost Circuit Malfunction?

Yes, a blown fuse in the rear defrost system can disrupt power to the circuit and trigger the B0283 code.

5. How do I diagnose the B0283 code in my Chevrolet?

Start by checking the rear defrost fuse and inspecting the defrost grid for damage. Then, examine the wiring, connectors, and relay for signs of wear, corrosion, or disconnection.

6. Is it safe to drive with the B0283 code active in my Chevrolet?

Yes, itâ€™s safe to drive, but you may experience visibility issues in cold or humid weather due to the rear defroster not working.

7. How do I fix the B0283 code on my Chevrolet?

Repairs may include replacing a blown fuse, repairing or replacing damaged wiring, fixing the rear defrost grid, or replacing a faulty relay or switch.

8. What tools are needed to troubleshoot the B0283 code?

You may need a multimeter to test wiring and connections, a fuse tester, and an OBDII scanner to confirm and clear the code after repairs.

9. Can a damaged rear defrost grid cause the B0283 code?

Yes, if the grid is broken or has an open circuit, it can prevent the defroster from working and trigger the code.

10. Do I need a professional to fix the B0283 code in my Chevrolet?

While basic checks like inspecting fuses and wiring can be done at home, more complex issues, such as repairing the defrost grid, may require professional assistance.