AutoCodes – Generic – B3927

B3927 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: B3927 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 2,308

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 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3927 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, 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.
The Diagnostic Trouble Code (DTC) sets when the control module's environment identifier does not match the environment identifier stored by the BCM.

OBDII Code B3927 - Incorrect Environmental Identifier Received from Electronic Brake Control Module - AutoCodes.com — B3927 Code - Incorrect Environmental Identifier Received from Electronic Brake Control Module

What does this mean?

What are the Possible Causes of the DTC B3927?

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 B3927?

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 B3927 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 B3927 code?

Need more information on how to fix the B3927 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3927 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3927 Buick — Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3927 Cadillac — Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3927 Chevrolet — Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3927 GMC — Incorrect Environmental Identifier Received from Electronic Brake Control Module

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 B3927 Code

1. What are the common symptoms of OBDII code B3927?

- Common symptoms include the illumination of the Check Engine Light, ABS warning light, and potential issues with the electronic brake control system.

2. What could cause the OBDII code B3927 to trigger?

- The code B3927 may be triggered by a communication error between the electronic brake control module and other modules in the vehicle.

3. How can I diagnose the OBDII code B3927?

- Diagnosing this code usually involves using a professional OBDII scanner to read the fault codes and pinpoint the specific communication issue.

4. What are the potential repair options for OBDII code B3927?

- Repair options include checking and fixing any loose or damaged wiring connections, replacing faulty electronic brake control module components, and reprogramming modules if necessary.

5. Can I drive my vehicle with the OBDII code B3927 present?

- It is not recommended to drive the vehicle with the B3927 code present, as it may indicate a problem with the electronic brake control system that could affect vehicle safety.

6. How much does it cost to repair OBDII code B3927?

- The cost of repair for code B3927 can vary depending on the specific issue causing the code, parts needed for replacement, and labor costs at the repair shop.

7. Can a DIY enthusiast fix the OBDII code B3927 at home?

- While some basic troubleshooting steps can be performed at home, diagnosing and repairing code B3927 often requires professional equipment and expertise due to the complexity of the electronic brake control system.

8. How often does the OBDII code B3927 occur in vehicles?

- The occurrence of code B3927 can vary depending on the make and model of the vehicle, but it is not as common as some other OBDII codes related to engine performance issues.

9. Is it necessary to clear the OBDII code B3927 after repairs are completed?

- Yes, it is recommended to clear the B3927 code after repairs have been made to ensure that the issue has been resolved and to turn off the Check Engine Light.

10. Can extreme weather conditions affect the triggering of the OBDII code B3927?

- Extreme weather conditions, such as extreme cold or heat, can potentially affect the electronic components involved in the communication system and lead to the triggering of code B3927.