AutoCodes – Buick – B3924 Buick

B3924 Buick Code - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module

Quick Answer

When certain modules are programmed and configured during installation, the module learns a specific environment identifier which is unique to the vehicle. Common causes include Faulty Inflatable Restraint Sensing and Diagnostic Module, Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted, Inflatable Restraint Sensing and Diagnostic Module 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
B3924 Buick indicates Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module.
Common causes
Common causes include Faulty Inflatable Restraint Sensing and Diagnostic Module, Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted, Inflatable Restraint Sensing and Diagnostic Module 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.
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Code Popularity 600
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 16, 2023
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Code B3924 Buick Description

When certain modules are programmed and configured during installation, the module learns a specific environment identifier which is unique to the vehicle. The environment identifier is used to prevent the swapping of control modules between vehicles. The Body Control Module (BCM) is the keeper of the environment identifier. The instrument cluster, electronic brake control module, Heating, Ventilation, and Air Conditioning (HVAC) Control Module, inflatable restraint sensing and diagnostic module, and telematics communication interface control module each learn the environment identifier during their configuration process. During vehicle operation, the BCM sends the immobilizer identifier as a challenge and each module responds to the challenge by sending the environment identifier back to the BCM. If the BCM sends an incorrect immobilizer identifier or a specific number of incorrect environment identifiers are received, vehicle starting is disabled.
The Diagnostic Trouble Code (DTC) sets when the control module's environment identifier does not match the environment identifier stored by the BCM.
OBDII Code B3924 Buick - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module - AutoCodes.com
B3924 Buick Code - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module

What are the Possible Causes of the DTC B3924 Buick?

  • Faulty Inflatable Restraint Sensing and Diagnostic Module
  • Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted
  • Inflatable Restraint Sensing and Diagnostic Module circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B3924 Buick?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3924 Buick 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.

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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 B3924 Buick Code

1. What are the common symptoms of OBDII code B3924 in a Buick?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential loss of functionality of the airbag system.

2. What does OBDII code B3924 in a Buick indicate?

- This code indicates that the Inflatable Restraint Sensing and Diagnostic Module has received an incorrect environmental identifier.

3. What are the possible causes of OBDII code B3924 in a Buick?

- Possible causes include a faulty Inflatable Restraint Sensing and Diagnostic Module, wiring issues, or a malfunction in the airbag system.

4. How can I diagnose OBDII code B3924 in a Buick?

- Diagnosing this code usually requires specialized diagnostic equipment to communicate with the airbag system and pinpoint the exact cause of the issue.

5. Can I continue driving my Buick with OBDII code B3924?

- It is not recommended to continue driving the vehicle with this code present, as it may compromise the effectiveness of the airbag system in the event of a collision.

6. How can OBDII code B3924 in a Buick be repaired?

- Repairing this code typically involves diagnosing the specific cause of the issue and then addressing it, which may include replacing the Inflatable Restraint Sensing and Diagnostic Module or repairing wiring faults.

7. Is it safe to reset the OBDII code B3924 in a Buick with a diagnostic tool?

- While you can reset the code with a diagnostic tool, it is important to address the underlying issue first to ensure the airbag system functions correctly.

8. Are there any DIY fixes for OBDII code B3924 in a Buick?

- Due to the safety implications of this code relating to the airbag system, it is recommended to have a professional diagnose and repair the issue.

9. How much does it typically cost to repair OBDII code B3924 in a Buick?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve parts replacement and labor costs, potentially ranging from a few hundred to over a thousand dollars.

10. Can OBDII code B3924 in a Buick cause other problems if left unresolved?

- Leaving this code unresolved can potentially compromise the safety of the airbag system and may lead to further issues in the event of a collision.

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