AutoCodes – GMC – B3924 2018 GMC Sierra

B3924 2018 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 2018 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 205

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 2018 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 2018 GMC Sierra - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module - AutoCodes.com — B3924 2018 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 2018 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 2018 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 2018 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 2018 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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B3924 in a 2018 GMC Sierra?

The common symptoms of OBDII code B3924 in a 2018 GMC Sierra include the airbag warning light illuminating on the dashboard and potential issues with the vehicle's airbag system.

2. What does the OBDII code B3924 "Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module" indicate?

This code indicates a communication error between the inflatable restraint sensing and diagnostic module in the vehicle's airbag system.

3. What are possible causes of OBDII code B3924 in a 2018 GMC Sierra?

Possible causes of code B3924 in a 2018 GMC Sierra include a faulty inflatable restraint sensing and diagnostic module, wiring issues, or a poor connection in the airbag system.

4. How can I diagnose and repair OBDII code B3924 in my 2018 GMC Sierra?

Diagnosing and repairing code B3924 typically requires using a professional OBDII scanner to retrieve the specific details of the error and then inspecting the inflatable restraint sensing and diagnostic module, wiring, and connections for any faults.

5. Is it safe to drive my 2018 GMC Sierra with OBDII code B3924 present?

It is not recommended to drive your vehicle with code B3924 present, as it indicates a potential issue with the airbag system, which is a critical safety component of the vehicle.

6. Can I reset the OBDII code B3924 in my 2018 GMC Sierra on my own?

While you can clear the code temporarily with an OBDII scanner, it is essential to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code B3924 in a 2018 GMC Sierra?

The cost of repairing OBDII code B3924 in a 2018 GMC Sierra can vary depending on the specific cause of the issue, but it may involve replacing the inflatable restraint sensing and diagnostic module or addressing wiring problems.

8. Will fixing OBDII code B3924 in my 2018 GMC Sierra require a visit to a mechanic?

Due to the complexity of diagnosing and repairing issues related to the airbag system, it is recommended to have a professional mechanic or dealership service department address and resolve OBDII code B3924 in your 2018 GMC Sierra.

9. Can OBDII code B3924 cause the airbags not to deploy in an accident?

Code B3924 may indicate a problem with the airbag system's communication, which could potentially affect the deployment of the airbags in the event of an accident. It is crucial to address this code promptly to ensure the proper functioning of the airbag system.

10. Is OBDII code B3924 a common issue in 2018 GMC Sierra vehicles?

While OBDII code B3924 may not be a widespread issue, it is essential to address it promptly to ensure the safety and proper operation of the airbag system in your 2018 GMC Sierra.