AutoCodes – GMC – B3928 2018 GMC Sierra

B3928 2018 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 2018 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 315

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 2018 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 2018 GMC Sierra - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module - AutoCodes.com — B3928 2018 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 2018 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 2018 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 2018 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 2018 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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B3928 in a 2018 GMC Sierra?

The common symptoms include issues with the telematics system, malfunction indicator lamp (MIL) illumination, communication errors, and potential loss of certain vehicle data.

2. What could be causing the OBDII code B3928 to appear in a 2018 GMC Sierra?

The code B3928 typically indicates that there is an incorrect environmental identifier received from the Telematics Communication Interface Control Module. This can be caused by wiring issues, a faulty module, software glitches, or communication network problems.

3. How can I diagnose the OBDII code B3928 in my 2018 GMC Sierra?

Diagnosing code B3928 involves using a diagnostic scanner to read the code, checking the connections and wiring related to the Telematics Communication Interface Control Module, and performing a thorough inspection of the module itself for any signs of damage or malfunction.

4. What are some repair tips for resolving OBDII code B3928 in a 2018 GMC Sierra?

Repair tips for resolving code B3928 may include checking and repairing any damaged wiring, ensuring the module is securely connected, updating software if necessary, and resetting the code to see if it reoccurs.

5. Can I drive my 2018 GMC Sierra with the OBDII code B3928 present?

It is generally not recommended to drive your vehicle with unresolved OBDII codes, including B3928. Continuing to drive with this code present may lead to further issues with the telematics system and other vehicle functionalities.

6. Is it safe to continue using the telematics features in my 2018 GMC Sierra if OBDII code B3928 is triggered?

It is advisable to refrain from using the telematics features until the B3928 code is diagnosed and repaired. Using the telematics system with this code present may result in inaccurate data or communication errors.

7. How much does it typically cost to repair OBDII code B3928 in a 2018 GMC Sierra?

The cost of repairing code B3928 can vary depending on the root cause of the issue, the extent of the repairs needed, and labor costs. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Can OBDII code B3928 in a 2018 GMC Sierra be a recurring issue?

If the underlying cause of the B3928 code is not properly addressed during repairs, it can potentially reoccur. Thorough diagnostics and repair work are essential to prevent the code from coming back.

9. Are there any recalls or technical service bulletins related to OBDII code B3928 in 2018 GMC Sierra vehicles?

It is advisable to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to inquire about any recalls or technical service bulletins related to code B3928 for your specific vehicle.

10. Can I reset the OBDII code B3928 in my 2018 GMC Sierra using an OBDII scanner?

Resetting the code B3928 with an OBDII scanner is possible, but it is important to first diagnose and address the root cause of the code to prevent it from reappearing. Simply resetting the code without fixing the underlying issue may lead to continued problems.