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B3920 Pontiac Code - Seat Motors Group 1 Common Circuit

Quick Answer

The B3920 diagnostic trouble code (DTC) for Pontiac vehicles refers to an issue with the Seat Motors Group 1 Common Circuit. Common causes include Wiring harness damage or corrosion, Faulty seat motor, Defective seat control module. 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 Pontiac indicates Seat Motors Group 1 Common Circuit.
Common causes
Common causes include Wiring harness damage or corrosion, Faulty seat motor, Defective seat control module.
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 11, 2024
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Code B3920 Pontiac Description

The B3920 diagnostic trouble code (DTC) for Pontiac vehicles refers to an issue with the Seat Motors Group 1 Common Circuit. This code indicates a problem with the electrical circuit that controls various seat motors in the vehicle. The seat motors are responsible for adjusting the position of the seats, including the seat back, seat cushion, and headrest.

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

Common Causes of B3920 Pontiac

  1. Wiring harness damage or corrosion
  2. Faulty seat motor
  3. Defective seat control module
  4. Poor electrical connections
  5. Communication error between components

Symptoms of B3920 Pontiac

  1. Inability to adjust the seat position
  2. Seat motors stuck in one position
  3. Erratic movement of seat motors
  4. Unresponsive seat adjustment controls

How to Fix B3920 Pontiac

  1. Perform a visual inspection of the wiring harness and connectors for any signs of damage or corrosion.
  2. Use a multimeter to test the continuity of the circuit and check for proper voltage at the seat motors.
  3. If a faulty seat motor is identified, replace the motor with a new one.
  4. Inspect the seat control module for any visible damage or malfunction and replace if necessary.
  5. Clear the DTC from the vehicle's memory using a diagnostic scanner to reset the system.

Cost to Fix B3920 Pontiac

The cost of repairing the B3920 code for the Seat Motors Group 1 Common Circuit can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this code can range from $150 to $500, including the cost of replacement parts and labor. However, it is important to note that the actual cost may be higher or lower depending on the location, make and model of the vehicle, and the hourly labor rates charged by the auto repair shop. It is recommended to obtain quotes from multiple repair shops to get a more accurate estimate.

What does this mean?

Tech Notes for B3920 Pontiac

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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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 Pontiac Code

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

B3920 indicates a problem with the Seat Motors Group 1 Common Circuit, typically involving electrical issues in the seat adjustment motor system.

2. What are the common symptoms of the B3920 code?

Symptoms include inoperative or malfunctioning power seat adjustments, unusual noises from the seat motors, or intermittent seat movement.

3. What causes the B3920 code to appear?

Common causes include damaged wiring, a faulty seat motor, a blown fuse, or a malfunctioning seat control module.

4. How can I diagnose the B3920 code?

Inspect the seat motor wiring for damage, check the fuses related to the power seat system, and test the seat control module and motor for proper operation.

5. Can I still drive my Pontiac with the B3920 code?

Yes, the code doesn't affect drivability, but it may prevent proper seat adjustments, potentially impacting comfort or driving ergonomics.

6. How do I fix the B3920 code on my Pontiac?

Repairs may involve replacing damaged wiring, fixing loose connections, replacing the seat motor, or reprogramming or replacing the seat control module.

7. How much does it cost to repair the B3920 code?

Repair costs vary but typically range from $100 to $500, depending on whether the issue is a simple wiring fix or a component replacement.

8. Can I clear the B3920 code without fixing the issue?

Clearing the code with a scanner may temporarily remove it, but it will likely return if the underlying issue isn’t resolved.

9. Does the B3920 code affect all Pontiac models the same way?

The code specifics may vary slightly by model, but it generally pertains to the seat motor circuit across Pontiac vehicles equipped with power seats.

10. Is the B3920 code a common issue in Pontiacs?

While not extremely common, this code can occur due to wear and tear on seat components or electrical issues in older Pontiacs.

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