AutoCodes – Chevrolet – B3978 2016 Chevrolet Silverado

B3978 2016 Chevrolet Silverado 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: B3978 2016 Chevrolet Silverado 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 218

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 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3978 2016 Chevrolet Silverado 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 (EBCM), 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.

OBDII Code B3978 2016 Chevrolet Silverado - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module - AutoCodes.com — B3978 2016 Chevrolet Silverado Code - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module

What does this mean?

What are the Possible Causes of the DTC B3978 2016 Chevrolet Silverado?

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 B3978 2016 Chevrolet Silverado?

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 B3978 2016 Chevrolet Silverado 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 B3978 2016 Chevrolet Silverado code?

Need more information on how to fix the B3978 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 B3978 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B3978 in a 2016 Chevrolet Silverado?

The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the airbag system function.

2. What does the OBDII code B3978 "Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module" mean for a 2016 Chevrolet Silverado?

This code indicates a communication error between the airbag module and other vehicle systems related to environmental sensing.

3. What are some possible causes of OBDII code B3978 in a 2016 Chevrolet Silverado?

Possible causes include wiring issues, faulty sensors, a malfunctioning airbag module, or a problem with the vehicle's electrical system.

4. How serious is OBDII code B3978 in a 2016 Chevrolet Silverado?

This code is considered serious as it indicates a potential issue with the airbag system, which is a critical safety component in the vehicle.

5. Can I continue driving my 2016 Chevrolet Silverado with OBDII code B3978 present?

It is not recommended to drive the vehicle with this code present as it may compromise the proper functioning of the airbag system in case of an accident.

6. How can I diagnose and repair OBDII code B3978 in my 2016 Chevrolet Silverado?

Diagnosis typically involves checking the wiring, sensors, and connections related to the airbag system. Repair may involve fixing wiring issues, replacing faulty sensors, or repairing/replacing the airbag module.

7. Is it safe to reset the OBDII code B3978 in a 2016 Chevrolet Silverado without addressing the underlying issue?

Resetting the code without addressing the underlying problem may temporarily turn off the warning light but will not fix the actual issue with the airbag system.

8. Can a DIY enthusiast address OBDII code B3978 in a 2016 Chevrolet Silverado?

While some basic checks like inspecting wiring connections can be done by a DIY enthusiast, diagnosing and repairing the underlying cause of this code may require professional expertise.

9. How much does it typically cost to repair OBDII code B3978 in a 2016 Chevrolet Silverado?

The cost of repair can vary depending on the specific cause of the code, but it may involve expenses for parts replacement, labor, and diagnostic services.

10. Will OBDII code B3978 cause my 2016 Chevrolet Silverado to fail a state emissions inspection?

This code is related to the airbag system and should not affect the vehicle's emissions. However, it is recommended to address the issue promptly for safety reasons.