AutoCodes – GMC – B3928 2014 GMC Sierra

B3928 2014 GMC Sierra 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 2014 GMC Sierra 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 168

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 2014 GMC Sierra 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 2014 GMC Sierra - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module - AutoCodes.com — B3928 2014 GMC Sierra Code - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module

What does this mean?

What are the Possible Causes of the DTC B3928 2014 GMC Sierra?

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 2014 GMC Sierra?

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 2014 GMC Sierra 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 B3928 2014 GMC Sierra code?

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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 2014 GMC Sierra Code

1. What does the OBDII code B3928 mean on a 2014 GMC Sierra?

The B3928 code indicates that the Telematics Communication Interface Control Module has received an incorrect environmental identifier, which can affect the vehicle's communication systems.

2. What are the symptoms of the B3928 code on a 2014 GMC Sierra?

Common symptoms include issues with OnStar functionality, telematics system errors, or a check engine light being illuminated.

3. What causes the code B3928 to appear?

Possible causes include a software issue in the Telematics Control Module, incorrect programming, or communication errors between vehicle modules.

4. Can a weak battery cause the B3928 code?

Yes, a weak or failing battery can cause communication errors, potentially triggering the B3928 code.

5. How do you diagnose the B3928 code on a 2014 GMC Sierra?

Diagnosis involves using a scan tool to check for related codes, inspecting the Telematics Control Module for faults, and verifying the communication network's integrity.

6. Is the B3928 code serious?

While it may not directly affect drivability, it can impair telematics functions like OnStar, which could be critical in emergencies.

7. How can the B3928 code be fixed?

Fixes may include reprogramming the Telematics Control Module, updating software, or replacing faulty wiring or the module itself.

8. Can I reset the B3928 code myself?

You can try clearing the code with an OBDII scanner, but if the underlying issue isnâ€™t resolved, the code is likely to return.

9. How much does it cost to repair the B3928 code?

Repair costs vary depending on the issue, but reprogramming or software updates generally cost less than replacing the Telematics Control Module, which could be several hundred dollars.

10. Can the B3928 code affect other vehicle systems?

Yes, since the telematics module communicates with other vehicle systems, the code could potentially impact diagnostics or other communication-dependent functions.