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B3981 2014 GMC Sierra Code - Incorrect Environmental Identifier Received from Electronic Brake Control Module

Quick Answer

The B3981 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that an incorrect environmental identifier has been received from the Electronic Brake Control Module (EBCM). Common causes include Faulty wiring or connectors leading to poor communication between modules, Malfunctioning environmental sensors providing incorrect data to the EBCM, A defective EBCM module causing communication errors. 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 2014 GMC Sierra indicates Incorrect Environmental Identifier Received from Electronic Brake Control Module.
Common causes
Common causes include Faulty wiring or connectors leading to poor communication between modules, Malfunctioning environmental sensors providing incorrect data to the EBCM, A defective EBCM module causing communication errors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B3981 2014 GMC Sierra Description

The B3981 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that an incorrect environmental identifier has been received from the Electronic Brake Control Module (EBCM). This means that there is a communication error between the EBCM and another module in the vehicle, possibly related to the environmental data being transmitted. The EBCM is responsible for controlling the vehicle's anti-lock braking system (ABS) and traction control system, so any issues with its communication can have a significant impact on the vehicle's performance and safety.

OBDII Code B3981 2014 GMC Sierra - Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3981 2014 GMC Sierra Code - Incorrect Environmental Identifier Received from Electronic Brake Control Module

Common Causes of B3981 2014 GMC Sierra

  1. Faulty wiring or connectors leading to poor communication between modules.
  2. Malfunctioning environmental sensors providing incorrect data to the EBCM.
  3. A defective EBCM module causing communication errors.
  4. Issues with other control modules in the vehicle affecting communication with the EBCM.
  5. Water or corrosion damage affecting the EBCM or related components.

Symptoms of B3981 2014 GMC Sierra

  1. ABS warning light illuminated on the dashboard.
  2. Traction control system malfunction or warning message.
  3. Erratic ABS operation during braking.
  4. Reduced stability and control while driving.
  5. Loss of braking assistance in certain situations.

How to Fix B3981 2014 GMC Sierra

  1. Begin by conducting a thorough inspection of the wiring harness and connectors for any signs of damage or corrosion. Repair or replace any faulty wiring.
  2. Check and test the environmental sensors to ensure they are providing accurate data to the EBCM. Replace any sensors that are malfunctioning.
  3. Scan the vehicle's computer system to identify any other control modules that may be causing communication issues with the EBCM. Address any faults found.
  4. If the EBCM is determined to be faulty, it may need to be replaced. Ensure the new module is properly programmed and calibrated for the vehicle.
  5. Clear the DTC and perform a test drive to verify that the issue has been resolved. Ensure that all systems are functioning correctly.

Cost to Fix B3981 2014 GMC Sierra

The cost of repairing a B3981 DTC on a 2014 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair can range from $200 to $800, with labor costs adding an additional $100 to $300. Overall, the total repair cost may fall between $300 and $1100. It is important to note that these are rough estimates, and actual costs can differ based on factors such as location, labor rates, and the need for additional repairs or parts replacement. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.

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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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B3981 in a 2014 GMC Sierra?

The common symptoms include the check engine light illuminating, ABS warning light appearing on the dashboard, and potential issues with the vehicle's braking system.

2. What does the OBDII code B3981 mean for a 2014 GMC Sierra?

OBDII code B3981 indicates that the Engine Control Module (ECM) has received an incorrect environmental identifier from the Electronic Brake Control Module (EBCM).

3. What are possible causes of OBDII code B3981 in a 2014 GMC Sierra?

Possible causes of this code include a faulty EBCM, wiring issues between the ECM and EBCM, or a software malfunction within the brake control system.

4. How can I diagnose OBDII code B3981 in my 2014 GMC Sierra?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault codes, checking the wiring connections between the ECM and EBCM, and performing a thorough inspection of the brake control system.

5. Can I continue driving my 2014 GMC Sierra with OBDII code B3981?

It is not recommended to continue driving the vehicle with this code present, as it can affect the proper functioning of the braking system and compromise overall safety.

6. How can I repair OBDII code B3981 in my 2014 GMC Sierra?

Repairing this code may involve replacing the Electronic Brake Control Module, repairing any damaged wiring connections, or updating the software in the brake control system.

7. Is OBDII code B3981 a serious issue in a 2014 GMC Sierra?

Yes, this code should be addressed promptly to ensure the proper functioning of the vehicle's braking system and to prevent potential safety hazards.

8. Can a DIY enthusiast fix OBDII code B3981 in a 2014 GMC Sierra?

While some simple tasks like checking wiring connections can be done by a DIY enthusiast, diagnosing and repairing issues related to the EBCM may require professional expertise.

9. How much does it cost to repair OBDII code B3981 in a 2014 GMC Sierra?

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

10. How often does OBDII code B3981 occur in a 2014 GMC Sierra?

The occurrence of this code can vary and is influenced by factors such as vehicle usage, maintenance history, and overall condition of the braking system.

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