AutoCodes – GMC – B3981 2017 GMC Sierra

B3981 2017 GMC Sierra Code - Incorrect Environmental Identifier Received from Electronic Brake Control 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 Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control 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: B3981 2017 GMC Sierra indicates Incorrect Environmental Identifier Received from Electronic Brake Control Module.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 203

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B3981 2017 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 (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 B3981 2017 GMC Sierra - Incorrect Environmental Identifier Received from Electronic Brake Control Module - AutoCodes.com — B3981 2017 GMC Sierra Code - Incorrect Environmental Identifier Received from Electronic Brake Control Module

What does this mean?

What are the Possible Causes of the DTC B3981 2017 GMC Sierra?

Faulty Electronic Brake Control Module (EBCM)
Electronic Brake Control Module harness is open or shorted
Electronic Brake Control Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3981 2017 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 B3981 2017 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 B3981 2017 GMC Sierra code?

Need more information on how to fix the B3981 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3981 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 B3981 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B3981 in a 2017 GMC Sierra?

Symptoms may include the illumination of the check engine light, ABS warning light, traction control warning light, and potential issues with the electronic brake control system.

2. What does the OBDII code B3981 mean for a 2017 GMC Sierra?

The code B3981 indicates that the vehicle's onboard diagnostic system has detected an Incorrect Environmental Identifier Received from the Electronic Brake Control Module.

3. What are the possible causes of OBDII code B3981 in a 2017 GMC Sierra?

Potential causes include faulty wiring connections, a malfunctioning Electronic Brake Control Module, issues with the environmental sensor, or a communication error between control modules.

4. How can I diagnose OBDII code B3981 in my 2017 GMC Sierra?

Diagnosis typically involves using an OBDII scanner to retrieve the specific code, inspecting wiring connections for any damage, testing the Electronic Brake Control Module, and verifying the functionality of the environmental sensor.

5. Can I continue driving my 2017 GMC Sierra with OBDII code B3981?

It is not recommended to continue driving with this code as it may affect the proper functioning of the electronic brake control system, ABS, or traction control systems. It is advised to address the issue promptly.

6. How can I repair OBDII code B3981 in my 2017 GMC Sierra?

Repair options may include repairing or replacing damaged wiring connections, replacing the Electronic Brake Control Module if faulty, ensuring proper environmental sensor operation, and addressing any communication errors between modules.

7. Is it possible to reset OBDII code B3981 in a 2017 GMC Sierra without fixing the underlying issue?

While clearing the code with an OBDII scanner may temporarily turn off the warning lights, the issue will likely resurface if the root cause is not addressed. It is recommended to diagnose and repair the problem.

8. Can a DIY enthusiast fix OBDII code B3981 in a 2017 GMC Sierra?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by following diagnostic procedures, checking wiring connections, and potentially replacing components like the Electronic Brake Control Module.

9. How much does it typically cost to repair OBDII code B3981 in a 2017 GMC Sierra at a professional mechanic or dealership?

Costs can vary based on the specific cause of the code and the labor rates in your area. Repairs for this code may range from a few hundred to over a thousand dollars, considering parts and labor.

10. Are there any recalls or technical service bulletins related to OBDII code B3981 in a 2017 GMC Sierra?

It's recommended to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any relevant recalls or technical service bulletins related to OBDII code B3981 in the 2017 GMC Sierra.