B3924 2016 GMC Sierra Code - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module
Quick Answer
The B3924 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that an incorrect environmental identifier was received from the Inflatable Restraint Sensing and Diagnostic Module (SDM). Common causes include Malfunctioning Inflatable Restraint Sensing and Diagnostic Module (SDM), Faulty wiring or connections in the airbag system, Sensor issues providing incorrect data to the SDM. 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 2016 GMC Sierra indicates Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module.
- Common causes
- Common causes include Malfunctioning Inflatable Restraint Sensing and Diagnostic Module (SDM), Faulty wiring or connections in the airbag system, Sensor issues providing incorrect data to the SDM.
- 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 B3924 2016 GMC Sierra Description
The B3924 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that an incorrect environmental identifier was received from the Inflatable Restraint Sensing and Diagnostic Module (SDM). The SDM is a crucial component of the vehicle's airbag system, responsible for detecting crashes and deploying the airbags when necessary. The environmental identifier refers to the data that the SDM uses to determine the severity of a crash and whether airbag deployment is needed.
Common Causes of B3924 2016 GMC Sierra
- Malfunctioning Inflatable Restraint Sensing and Diagnostic Module (SDM).
- Faulty wiring or connections in the airbag system.
- Sensor issues providing incorrect data to the SDM.
- Water damage or corrosion affecting the SDM or related components.
- Impact or collision that may have damaged the airbag system.
Symptoms of B3924 2016 GMC Sierra
- Airbag warning light illuminated on the dashboard.
- Inconsistent or erratic airbag deployment.
- Loss of communication with the SDM.
- Vehicle fails to pass airbag system inspection during routine maintenance.
- Potential safety concerns in the event of a collision due to improper airbag deployment.
How to Fix B3924 2016 GMC Sierra
- Diagnose the specific cause of the incorrect environmental identifier by using a scan tool to read the SDM data.
- Inspect the wiring and connections in the airbag system for any damage or corrosion.
- Test the sensors that provide data to the SDM to ensure they are functioning correctly.
- Replace the Inflatable Restraint Sensing and Diagnostic Module (SDM) if it is determined to be faulty.
- Clear the DTC and perform a test to verify that the airbag system is functioning properly.
Cost to Fix B3924 2016 GMC Sierra
The typical repair costs for addressing the B3924 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. Replacement of the Inflatable Restraint Sensing and Diagnostic Module (SDM) and related components, along with labor costs, can range from $300 to $800. It is important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Factors such as location, vehicle make and model, and engine type can also influence repair costs. For a more accurate estimate, it is recommended to consult with local auto repair shops.
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Frequently Asked Questions about B3924 2016 GMC Sierra Code
1. What does the OBDII code B3924 mean on a 2016 GMC Sierra?
The B3924 code indicates that the Inflatable Restraint Sensing and Diagnostic Module (SDM) has received an incorrect environmental identifier, typically related to a communication or configuration issue.
2. What are the common symptoms of code B3924 in a 2016 GMC Sierra?
Symptoms may include the airbag warning light illuminating on the dashboard, a stored fault code, or issues with airbag functionality.
3. What causes the code B3924 to trigger on a GMC Sierra?
This code is often caused by a mismatch in communication between the SDM and other vehicle modules, incorrect programming, damaged wiring, or a faulty SDM.
4. Is it safe to drive a 2016 GMC Sierra with the B3924 code?
While the truck is typically drivable, the airbag system may not function correctly in the event of a collision, which can compromise safety.
5. How do you diagnose the B3924 code on a 2016 GMC Sierra?
Diagnosis involves scanning the vehicle with a professional OBDII scanner, checking for any communication errors, inspecting module programming, and examining wiring for damage or loose connections.
6. Can a faulty Inflatable Restraint Sensing and Diagnostic Module cause the B3924 code?
Yes, a faulty SDM can cause this code if it fails to process or transmit the correct environmental identifier.
7. How do you fix the B3924 code on a 2016 GMC Sierra?
Repairs may include reprogramming or recalibrating the SDM, repairing damaged wiring, addressing module communication issues, or replacing the SDM if necessary.
8. What tools are needed to repair the B3924 code?
You’ll need a professional-grade OBDII scanner capable of accessing airbag system codes and performing module programming or calibration, as well as basic electrical testing tools.
9. Can clearing the code B3924 resolve the issue permanently?
Clearing the code may temporarily turn off the airbag light, but if the underlying issue isn’t addressed, the code will return.
10. Should I take my 2016 GMC Sierra to a professional for the B3924 code?
Yes, because the airbag system is critical for safety, it’s recommended to have a professional diagnose and repair the issue to ensure proper functionality.
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