AutoCodes – Chevrolet – B3920 2015 Chevrolet Silverado

B3920 2015 Chevrolet Silverado Code - Seat Motors Group 1 Common Circuit

Quick Answer

The Seat Memory Control Module controls the seat, lumbar, and adjustable pedal motors via half bridges that are connected to power rails internal to the module. Common causes include Faulty Seat, Lumbar, or Adjustable Pedal Motors, Seat, Lumbar, or Adjustable Pedal Motors harness is open or shorted, Seat, Lumbar, or Adjustable Pedal Motors circuit poor electrical connection. 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 2015 Chevrolet Silverado indicates Seat Motors Group 1 Common Circuit.
Common causes: Common causes include Faulty Seat, Lumbar, or Adjustable Pedal Motors, Seat, Lumbar, or Adjustable Pedal Motors harness is open or shorted, Seat, Lumbar, or Adjustable Pedal Motors circuit poor electrical connection.
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.

Save to My Repairs My Repairs

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

Code Popularity 207

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 16, 2023

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

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

Code B3920 2015 Chevrolet Silverado Description

The Seat Memory Control Module controls the seat, lumbar, and adjustable pedal motors via half bridges that are connected to power rails internal to the module. The Seat Memory Control Module connects all of the motor control circuits on each power rail to a common reference point whenever they are not in operation. The module monitors all seat motor control circuits for a shorted to ground or voltage before enabling any seat motor.
When a power seat, lumbar, or adjustable pedal switch is pressed or when a memory recall is requested, each seat motor receives battery voltage and ground from the seat memory control module via the motor control circuits. All motors are reversible, so the direction the motor rotates depends on which control circuit voltage is applied and which control circuit ground is applied. When the switch is operated in the opposite direction, the module reverses the polarity and applies voltage and ground to the opposite circuits to move the seat in the opposite direction.
The Diagnostic Trouble Code (DTC) sets when the voltage on any power rail 1 motor control circuit exceeds 2.78 volts for 100 ms or is below 1.47 volts for 100 ms.

OBDII Code B3920 2015 Chevrolet Silverado - Seat Motors Group 1 Common Circuit - AutoCodes.com — B3920 2015 Chevrolet Silverado Code - Seat Motors Group 1 Common Circuit

What does this mean?

What are the Possible Causes of the DTC B3920 2015 Chevrolet Silverado?

Faulty Seat, Lumbar, or Adjustable Pedal Motors
Seat, Lumbar, or Adjustable Pedal Motors harness is open or shorted
Seat, Lumbar, or Adjustable Pedal Motors circuit poor electrical connection
Faulty Seat Memory Control Module

How to Fix the DTC B3920 2015 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3920 2015 Chevrolet Silverado 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 B3920 2015 Chevrolet Silverado code?

Need more information on how to fix the B3920 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3920 2015 Chevrolet Silverado 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 B3920 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B3920 in a 2015 Chevrolet Silverado related to the Seat Motors Group 1 Common Circuit?

The common symptoms may include non-functional seat motors, inability to adjust seat positions, or erratic seat movements.

2. What are the possible causes of OBDII code B3920 in a 2015 Chevrolet Silverado related to the Seat Motors Group 1 Common Circuit?

Possible causes may include a faulty seat motor, damaged wiring harness, loose or corroded connectors, or a malfunctioning control module.

3. How can I diagnose the issue causing OBDII code B3920 in my 2015 Chevrolet Silverado related to the Seat Motors Group 1 Common Circuit?

You can use a diagnostic scanner to retrieve the trouble code, inspect the seat motors and wiring for any visible damage, and perform a continuity test on the circuit.

4. What are some repair tips for addressing OBDII code B3920 in a 2015 Chevrolet Silverado related to the Seat Motors Group 1 Common Circuit?

Repair tips may include repairing or replacing damaged wiring, securing loose connectors, replacing a faulty seat motor, or reprogramming the control module if necessary.

5. Can I reset the OBDII code B3920 in my 2015 Chevrolet Silverado related to the Seat Motors Group 1 Common Circuit without fixing the underlying issue?

Resetting the code without addressing the underlying problem may temporarily turn off the check engine light, but the issue will likely persist and trigger the code again.

6. Is it safe to continue driving my 2015 Chevrolet Silverado with OBDII code B3920 related to the Seat Motors Group 1 Common Circuit?

It is not recommended to drive the vehicle with unresolved OBDII code B3920, as it may affect the functionality of the seat motors and compromise the driver's comfort and safety.

7. How much does it typically cost to repair OBDII code B3920 in a 2015 Chevrolet Silverado related to the Seat Motors Group 1 Common Circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may involve labor charges for diagnosis and repair, as well as the cost of any replacement parts needed.

8. Can a DIY enthusiast fix OBDII code B3920 in a 2015 Chevrolet Silverado related to the Seat Motors Group 1 Common Circuit?

While some basic troubleshooting and repairs can be done by a DIY enthusiast, diagnosing and fixing complex electrical issues like this code may require professional expertise and specialized tools.

9. Will OBDII code B3920 in my 2015 Chevrolet Silverado reset on its own after a certain number of driving cycles?

In some cases, if the underlying issue causing the code is resolved, the vehicle's computer may clear the code after a certain number of successful driving cycles without detecting the problem.

10. How can I prevent OBDII code B3920 from recurring in my 2015 Chevrolet Silverado related to the Seat Motors Group 1 Common Circuit?

Regularly inspecting the seat motors, wiring, and connectors for damage, ensuring proper maintenance of the vehicle's electrical system, and addressing any issues promptly can help prevent the recurrence of this code.