The Buick fault code B3920 indicates an issue with the Seat Memory Control Module.
This affects the seat, lumbar, or adjustable pedal motors.
Symptoms include the Engine Light being ON.
The cause could be faulty motors, openshorted harness, or poor electrical connection.
It’s not a serious issue but should be addressed.
A possible fix is to inspect and repair the wiring harness and connectors related to the motors.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms for Buick b3920
The vehicle displays a warning light indicating a fault with the Buick B3920 code.
- Symptoms: Engine Light ON.
- The driver may experience issues with the power liftgate operation.
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Causes for Buick b3920
Possible triggers for Buick fault code B3920 include issues with the key transponder or immobilizer system.
- B3920 can be caused by faulty Seat, Lumbar, or Adjustable Pedal Motors.
- A Seat, Lumbar, or Adjustable Pedal Motors harness that is open or shorted.
- A Seat, Lumbar, or Adjustable Pedal Motors circuit with poor electrical connection.
- A faulty Seat Memory Control Module.
Fix for Buick b3920
To address fault code B3920 on a Buick, inspect and repair the ParkNeutral Position Switch circuit.
- To fix B3920, Review the possible causes related to the fault code.
- Visually inspect the wiring harness and connectors associated with the code.
- Check for any damaged components and examine the connector pins for signs of being broken, bent, pushed out, or corroded.
- Repair or replace any damaged wiring or connectors as necessary.
- Perform a module reset or software update if recommended by the diagnostic procedure.
Description for Buick b3920
The fault code B3920 in a Buick indicates an issue with the key transponder.
Code B3920 for a Buick indicates an issue with the Park Brake Control Module (PBCM) communication circuit.
This code is triggered by the PBCM when it detects a fault in the communication signal with other modules on the vehicle’s network, such as the Body Control Module (BCM) or the Engine Control Module (ECM).
The PBCM relies on this communication to coordinate functions related to the parking brake system, such as engaging and disengaging the parking brake.
When this communication circuit malfunctions, it can lead to issues with the proper operation of the parking brake system.
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Tech Notes for Buick b3920
For Buick fault code B3920, refer to detailed diagnostic information for accurate troubleshooting and repair guidance.
The Buick fault code B3920 indicates an issue with the Transmission Control Module (TCM) power circuit.
To diagnose and fix this problem, start by checking the TCM power and ground using a multimeter.
Ensure that the TCM is receiving the correct voltage and ground connection for proper operation.
Next, use a scan tool to communicate with the TCM and verify if it responds over the Controller Area Network (CAN) network.
If the TCM is not communicating properly, it may need to be reprogrammed or reflashed to resolve the issue.
Additionally, visually inspect the wiring harness and connectors related to the TCM.
Look for any signs of damage, such as frayed wires or corroded connectors.
Check the connector pins for any signs of being broken, bent, pushed out, or corroded, as these issues can also cause the B3920 fault code.
By following these diagnostic steps and performing the necessary tests, you can pinpoint the root cause of the B3920 fault code in your Buick and take appropriate action to fix the problem.
FAQ
Fault code B3920 in a Buick indicates an issue with the seat, lumbar, or adjustable pedal motors. Check for faulty motors, wiring, or connectors.
Diagnose fault code B3920 in your Buick by checking for faulty seat, lumbar, or adjustable pedal motors, harness issues, or a faulty seat memory control module.
To fix fault code B3920 in a Buick, check for faulty seat, lumbar, or adjustable pedal motors, harness issues, or a faulty seat memory control module. Inspect wiring and connectors.
