AutoCodes – GMC – B3924 2015 GMC Sierra

B3924 2015 GMC Sierra 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 2015 GMC Sierra 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 344

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
Cost to Diagnose
FAQs
Comments
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Code B3924 2015 GMC Sierra 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 2015 GMC Sierra - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module - AutoCodes.com — B3924 2015 GMC Sierra Code - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module

What does this mean?

What are the Possible Causes of the DTC B3924 2015 GMC Sierra?

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 2015 GMC Sierra?

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 2015 GMC Sierra 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 B3924 2015 GMC Sierra code?

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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 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B3924 in a 2015 GMC Sierra?

- The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the vehicle's airbag system.

2. What does OBDII code B3924 indicate in a 2015 GMC Sierra?

- OBDII code B3924 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 2015 GMC Sierra?

- Possible causes of this code include a malfunction in the sensing and diagnostic module, wiring issues, a faulty airbag system component, or a communication error.

4. How can I diagnose OBDII code B3924 in my 2015 GMC Sierra?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific error code, checking the wiring connections, inspecting the airbag system components, and testing the sensing module.

5. Can OBDII code B3924 be repaired at home?

- Repairing OBDII code B3924 may require advanced diagnostic tools and expertise, so it is recommended to consult a professional mechanic for repairs to ensure proper diagnosis and resolution.

6. Is it safe to drive my 2015 GMC Sierra with OBDII code B3924?

- It is not advisable to drive the vehicle with an active airbag system fault code. It is important to address the issue promptly to ensure the proper functioning of the airbag system in case of an accident.

7. How much does it typically cost to repair OBDII code B3924 in a 2015 GMC Sierra?

- The cost of repairing OBDII code B3924 can vary depending on the specific cause of the issue, the needed repairs or replacements, and labor costs. It is recommended to obtain quotes from automotive professionals.

8. Can resetting the OBDII code B3924 in a 2015 GMC Sierra fix the issue?

- Resetting the code may temporarily turn off the warning light, but it will not address the underlying problem causing the code. It is essential to diagnose and repair the root cause of the issue.

9. How long does it take to repair OBDII code B3924 in a 2015 GMC Sierra?

- The repair time for this code can vary depending on the complexity of the issue and the availability of parts. Some repairs may be completed within a few hours, while others may take longer.

10. Is OBDII code B3924 a common issue in 2015 GMC Sierra vehicles?

- While not extremely common, OBDII code B3924 can occur in 2015 GMC Sierra vehicles due to various factors, and it is important to address it promptly to ensure the safety of the airbag system.