AutoCodes – Chevrolet – B3981 2015 Chevrolet Silverado

B3981 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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.

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Code Popularity 361

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 B3981 2015 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 B3981 2015 Chevrolet Silverado - Incorrect Environmental Identifier Received from Electronic Brake Control Module - AutoCodes.com — B3981 2015 Chevrolet Silverado Code - Incorrect Environmental Identifier Received from Electronic Brake Control Module

What does this mean?

What are the Possible Causes of the DTC B3981 2015 Chevrolet Silverado?

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 2015 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 B3981 2015 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 B3981 2015 Chevrolet Silverado code?

Need more information on how to fix the B3981 2015 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 B3981 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B3981 in a 2015 Chevrolet Silverado?

- Common symptoms include the illumination of the ABS warning light on the dashboard and potential issues with the vehicle's braking system.

2. What does the OBDII code B3981 indicate in a 2015 Chevrolet Silverado?

- This code indicates that the Electronic Brake Control Module has received an incorrect environmental identifier.

3. What are the possible causes of OBDII code B3981 in a 2015 Chevrolet Silverado?

- Possible causes include a faulty Electronic Brake Control Module, wiring issues, software glitches, or sensor malfunctions.

4. How can I diagnose OBDII code B3981 in my 2015 Chevrolet Silverado?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the wiring and connections related to the brake control module, and conducting a thorough visual inspection.

5. Is it safe to drive my 2015 Chevrolet Silverado with OBDII code B3981?

- It is not recommended to drive the vehicle with this code active, as it may affect the proper functioning of the braking system and compromise safety.

6. Can OBDII code B3981 be cleared/reset in a 2015 Chevrolet Silverado?

- Yes, the code can be cleared/reset using an OBDII scanner after addressing the underlying issue causing the fault code.

7. How can I repair OBDII code B3981 in my 2015 Chevrolet Silverado?

- Repair options may include replacing the Electronic Brake Control Module, repairing or replacing damaged wiring, updating software, or recalibrating sensors.

8. Is OBDII code B3981 a common issue in 2015 Chevrolet Silverado vehicles?

- While not extremely common, this code can occur in 2015 Chevrolet Silverado vehicles due to various factors affecting the Electronic Brake Control Module.

9. Can a DIY enthusiast fix OBDII code B3981 in a 2015 Chevrolet Silverado?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address the issue by following repair guides or seeking professional advice.

10. Will ignoring OBDII code B3981 cause further damage to my 2015 Chevrolet Silverado?

- Ignoring this code may lead to potential brake system malfunctions, reduced braking performance, and safety hazards, so it is advisable to address the issue promptly.