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B3920 Chevrolet Code - Seat Motors Group 1 Common Circuit

Quick Answer

The B3920 Chevrolet code refers to an issue with the Seat Motors Group 1 Common Circuit in the vehicle. Common causes include Faulty seat motor, Wiring issues in the seat motors group 1 common circuit, Loose electrical connections. 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
B3920 Chevrolet indicates Seat Motors Group 1 Common Circuit.
Common causes
Common causes include Faulty seat motor, Wiring issues in the seat motors group 1 common circuit, Loose electrical connections.
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 07, 2024
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Code B3920 Chevrolet Description

The B3920 Chevrolet code refers to an issue with the Seat Motors Group 1 Common Circuit in the vehicle. This code indicates a problem with the electrical circuit that controls the seat motors in the vehicle. The seat motors are responsible for adjusting the position of the seats, including moving them forward and backward, up and down, and reclining the backrest. When this circuit malfunctions, it can lead to issues with the seat adjustment functionality.

OBDII Code B3920 Chevrolet - Seat Motors Group 1 Common Circuit
B3920 Chevrolet Code - Seat Motors Group 1 Common Circuit

Common Causes of B3920 Chevrolet

  1. Faulty seat motor
  2. Wiring issues in the seat motors group 1 common circuit
  3. Loose electrical connections
  4. Blown fuse related to the seat motors
  5. Defective seat control module

Symptoms of B3920 Chevrolet

  1. Inability to adjust the position of the seats
  2. Seats stuck in one position
  3. Unusual noises coming from the seat motors
  4. Seat adjustment buttons not working
  5. Seat motors not responding to commands

How to Fix B3920 Chevrolet

  1. Begin by conducting a thorough inspection of the seat motors and wiring to locate any visible signs of damage or wear.
  2. Test the seat motors and wiring using a multimeter to check for continuity and proper voltage.
  3. Replace any faulty seat motors or wiring components as needed.
  4. Inspect and tighten any loose electrical connections in the seat motors group 1 common circuit.
  5. Reset the seat control module and clear the diagnostic trouble codes to see if the issue has been resolved.

Cost to Fix B3920 Chevrolet

The typical repair costs for addressing the B3920 Chevrolet code can vary depending on the extent of the issue and the specific components that need to be replaced. In general, the cost of parts for this repair can range from $100 to $300, while labor costs can add an additional $100 to $200 to the total bill. Overall, the total repair cost for this issue may fall between $200 and $500. However, it is important to note that these costs are estimates and can vary based on factors such as location, vehicle make and model, and the specific diagnosis time and labor rates at auto repair shops. It is recommended to obtain quotes from local auto repair shops to get a more accurate estimate for this repair.

What does this mean?

Tech Notes for B3920 Chevrolet

B3920 01 Group 1 Seat Motors Circuit Shorted to Battery or Open
B3920 02 Group 1 Seat Motors Circuit Shorted to Ground

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Information for Specific Chevrolet Models

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 B3920 Chevrolet Code

1. What does the OBDII code B3920 mean on a Chevrolet?

B3920 indicates a fault in the Seat Motors Group 1 Common Circuit, which typically relates to an issue with the power seat motor or its associated wiring.

2. What are the common symptoms of the B3920 code in a Chevrolet?

Symptoms may include power seats not moving, limited seat adjustment functionality, or intermittent operation of the seat motors.

3. What causes the B3920 code to appear in a Chevrolet?

The code can be triggered by a faulty seat motor, damaged wiring or connectors, a blown fuse, or an issue with the seat control module.

4. How can I diagnose the B3920 code on my Chevrolet?

Start by checking the seat motor wiring and connectors for damage or corrosion, test the seat motors, and use a scan tool to verify the fault in the seat control module.

5. Can the B3920 code be caused by a dead battery?

A dead or weak battery is unlikely to directly cause this code, but low voltage can affect seat motor operation and trigger related issues.

6. Is it safe to drive with the B3920 code active?

Yes, it is generally safe to drive; however, the seat adjustment functions may be limited or non-operational, affecting comfort or driving ergonomics.

7. How do I fix the B3920 code on a Chevrolet?

Repairs may include replacing the seat motor, repairing damaged wiring, cleaning corroded connectors, or reprogramming the seat control module if necessary.

8. Can I reset the B3920 code without repairs?

Clearing the code with a scan tool may temporarily remove it, but if the underlying issue is not resolved, the code is likely to return.

9. How much does it cost to fix the B3920 code in a Chevrolet?

Repair costs vary but generally range from $100 to $500, depending on whether the issue is a simple wiring repair or requires seat motor or module replacement.

10. Can a faulty seat control module cause the B3920 code?

Yes, a malfunctioning seat control module can fail to properly control the seat motor circuits and trigger the B3920 code.

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