AutoCodes – GMC – B3928 GMC

B3928 GMC 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 GMC 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 556

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

What does this mean?

What are the Possible Causes of the DTC B3928 GMC?

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 GMC?

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 GMC 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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Information for Specific GMC Models

B3928 2014 GMC Sierra — Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module
B3928 2015 GMC Sierra — Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module
B3928 2016 GMC Sierra — Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module
B3928 2017 GMC Sierra — Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module
B3928 2018 GMC Sierra — Incorrect Environmental Identifier Received from Telematics Communication Interface 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 B3928 GMC Code

1. What are common symptoms of OBDII code B3928 GMC?

The common symptoms include the check engine light being illuminated, issues with the telematics system, and potential communication problems with the vehicle's control modules.

2. What causes OBDII code B3928 GMC to trigger?

This code is typically triggered when the Telematics Communication Interface Control Module sends an incorrect environmental identifier, often due to a malfunction in the module itself or a communication error within the vehicle's network.

3. How serious is OBDII code B3928 GMC?

While this code may not directly affect the drivability of the vehicle, it is important to address it in a timely manner to ensure proper functioning of the telematics system and to prevent potential communication issues with other control modules.

4. How can I diagnose OBDII code B3928 GMC?

Diagnosing this code usually involves using a diagnostic scanner to retrieve the specific fault code, checking the connections to the Telematics Communication Interface Control Module, and inspecting for any visible signs of damage or corrosion.

5. Can I repair OBDII code B3928 GMC myself?

Repairing this code may require advanced diagnostic tools and knowledge of vehicle electronics. It is recommended to consult with a qualified mechanic or dealership to accurately diagnose and repair the issue.

6. Will driving with OBDII code B3928 GMC cause further damage?

Continuing to drive with this code present may not cause immediate damage to the vehicle, but unresolved communication issues could potentially lead to other system malfunctions over time.

7. How much does it cost to fix OBDII code B3928 GMC?

The cost of repairing this code can vary depending on the underlying cause of the issue, the labor rates of the repair facility, and whether any parts need to be replaced. It is advisable to obtain a quote from a trusted mechanic.

8. Can resetting the OBDII system clear code B3928 GMC?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return once the vehicle is driven and the system detects the fault again.

9. Is OBDII code B3928 GMC a common issue in GMC vehicles?

This specific code may not be as common as some other OBDII codes, but it can still occur in GMC vehicles equipped with telematics systems and communication interface control modules.

10. How long does it take to fix OBDII code B3928 GMC?

The repair time for this code can vary depending on the cause of the issue and the complexity of the repair. In some cases, it may be a quick fix, while in others, it could take several hours to diagnose and repair.