AutoCodes – Buick – B3928 Buick

B3928 Buick Code - Incorrect Environmental Identifier Received from Telematics Communication Interface 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 Telematics Communication Interface Control Module, Telematics Communication Interface Control Module harness is open or shorted, Telematics Communication Interface 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: B3928 Buick indicates Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module.
Common causes: Common causes include Faulty Telematics Communication Interface Control Module, Telematics Communication Interface Control Module harness is open or shorted, Telematics Communication Interface 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 456

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 B3928 Buick 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 B3928 Buick - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module - AutoCodes.com — B3928 Buick Code - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module

What does this mean?

What are the Possible Causes of the DTC B3928 Buick?

Faulty Telematics Communication Interface Control Module
Telematics Communication Interface Control Module harness is open or shorted
Telematics Communication Interface Control Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3928 Buick?

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 B3928 Buick 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.

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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 B3928 Buick Code

1. What are the common symptoms of OBDII code B3928 in a Buick?

- The common symptoms include the malfunction indicator light (MIL) illuminating on the dashboard, issues with the telematics system, and potential communication failures.

2. What causes the OBDII code B3928 to occur in a Buick?

- This code is usually triggered by a communication error between the telematics communication interface control module and other related modules in the vehicle.

3. How can I diagnose the OBDII code B3928 in my Buick?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the specific fault codes, checking for any loose or damaged wiring connections, and testing the communication between modules.

4. Is it safe to drive my Buick with the OBDII code B3928 present?

- While the vehicle may still be operational with this code, it is recommended to address the issue promptly to prevent any potential telematics system malfunctions or communication problems.

5. Can I reset the OBDII code B3928 in my Buick without fixing the underlying issue?

- Resetting the code without addressing the root cause will only temporarily clear the fault code, and it is likely to reappear once the issue persists.

6. What are some repair tips for resolving the OBDII code B3928 in a Buick?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, and updating software if necessary to resolve the communication error.

7. Are there any recalls or technical service bulletins related to the OBDII code B3928 in Buick vehicles?

- It's recommended to check with the manufacturer or authorized dealerships for any relevant recalls or technical service bulletins that may address this specific OBDII code.

8. Can a DIY enthusiast fix the OBDII code B3928 issue in a Buick?

- Depending on the individual's experience and access to tools, addressing the B3928 code may be possible for some DIY enthusiasts, especially if it involves checking and repairing wiring connections.

9. How much does it typically cost to repair the OBDII code B3928 in a Buick at a professional mechanic or dealership?

- Repair costs can vary depending on the exact cause of the issue, but it is advisable to obtain estimates from reputable mechanics or dealerships for an accurate assessment.

10. Is the OBDII code B3928 specific to Buick vehicles, or can it occur in other makes and models?

- While the specific code B3928 may be unique to Buick vehicles, similar communication interface control module issues can occur in other makes and models, triggering different OBDII codes.