B3920 2016 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 2016 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.
Code B3920 2016 Chevrolet Silverado Description
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.
What are the Possible Causes of the DTC B3920 2016 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 2016 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.
Code Tech Notes
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 2016 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 2016 Chevrolet Silverado code?
Need more information on how to fix the B3920 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B3920 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B3920 2016 Chevrolet Silverado Code
1. What does OBDII code B3920 mean on a 2016 Chevrolet Silverado?
Code B3920 indicates an issue with the Seat Motors Group 1 Common Circuit, which controls specific seat adjustment motors.
2. What are common symptoms of code B3920 on a 2016 Silverado?
Symptoms include malfunctioning seat adjustments, limited or no movement in seat motors, and potential electrical issues like blown fuses.
3. What causes code B3920 in a 2016 Chevrolet Silverado?
Common causes include damaged seat motor wiring, faulty seat adjustment motors, bad connectors, or issues with the seat control module.
4. How can I diagnose code B3920 on my Silverado?
Use a scan tool to confirm the code, inspect the seat motor wiring and connectors for damage, and test the seat control module functionality.
5. Can a blown fuse cause code B3920 on a Chevrolet Silverado?
Yes, a blown fuse in the seat circuit can trigger this code by disrupting power to the seat motors.
6. How do I fix code B3920 on my 2016 Silverado?
Repairs may include replacing damaged wiring, repairing or replacing faulty seat motors, and ensuring the seat control module is functioning properly.
7. Is code B3920 a serious issue for my Silverado?
While it won't affect vehicle drivability, it can limit seat adjustment functionality, which may be inconvenient or unsafe.
8. Can I clear code B3920 without repairs?
Clearing the code without addressing the underlying issue may temporarily remove it but won’t resolve the problem or restore seat functionality.
9. What tools are needed to fix code B3920 on a Silverado?
You’ll need a diagnostic scan tool, multimeter for electrical testing, and basic hand tools to inspect and repair seat motor components.
10. Should I take my Silverado to a professional for code B3920?
If you’re unfamiliar with electrical diagnostics or seat motor repairs, it’s best to consult a certified mechanic to ensure proper troubleshooting and repair.
Discuss the causes and fixes for B3920 2016 Chevrolet Silverado OBDII Code
Code B3920 2016 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
