AutoCodes – Chevrolet – B3902 2017 Chevrolet Silverado

B3902 2017 Chevrolet Silverado Code - Incorrect Immobilizer Identifier Received

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 Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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: B3902 2017 Chevrolet Silverado indicates Incorrect Immobilizer Identifier Received.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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 423

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 B3902 2017 Chevrolet Silverado 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 modules between vehicles. The Body Control Module (BCM) is the keeper of the environment identifier. The instrument cluster, electronic brake control module, HVAC control module, inflatable restraint sensing and diagnostic module, Engine Control Module (ECM), and steering column lock module (if equipped) 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 B3902 2017 Chevrolet Silverado - Incorrect Immobilizer Identifier Received - AutoCodes.com — B3902 2017 Chevrolet Silverado Code - Incorrect Immobilizer Identifier Received

What does this mean?

What are the Possible Causes of the DTC B3902 2017 Chevrolet Silverado?

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

How to Fix the DTC B3902 2017 Chevrolet Silverado?

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 B3902 2017 Chevrolet Silverado 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 B3902 2017 Chevrolet Silverado code?

Need more information on how to fix the B3902 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 B3902 2017 Chevrolet Silverado Code

1. What are common symptoms of OBDII code B3902 in a 2017 Chevrolet Silverado?

- Common symptoms include the vehicle not starting, the engine stalling, or the immobilizer warning light illuminating on the dashboard.

2. What does the OBDII code B3902 "Incorrect Immobilizer Identifier Received" indicate in a 2017 Chevrolet Silverado?

- This code indicates a communication error between the immobilizer system and the vehicle's electronic control module.

3. What are possible causes of OBDII code B3902 in a 2017 Chevrolet Silverado?

- Possible causes include a faulty immobilizer module, issues with the wiring or connections, or a malfunction in the electronic control module.

4. How can I diagnose OBDII code B3902 in my 2017 Chevrolet Silverado?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific code, checking the immobilizer system components for faults, and testing the wiring for continuity.

5. Can I drive my 2017 Chevrolet Silverado with OBDII code B3902?

- It is not recommended to drive the vehicle with this code present, as it may lead to potential starting or stalling issues, compromising safety and performance.

6. What repair steps can I take to fix OBDII code B3902 in my 2017 Chevrolet Silverado?

- Repair steps may include replacing the faulty immobilizer module, repairing any wiring issues, or reprogramming the electronic control module to synchronize with the immobilizer system.

7. Is it possible to reset OBDII code B3902 in a 2017 Chevrolet Silverado without professional help?

- Resetting this code may require specialized diagnostic equipment and knowledge, so it is advisable to seek assistance from a qualified mechanic or dealership.

8. How much does it typically cost to repair OBDII code B3902 in a 2017 Chevrolet Silverado?

- The cost of repair can vary depending on the specific issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

9. Will OBDII code B3902 cause my 2017 Chevrolet Silverado to fail an emissions test?

- Yes, this code may cause the vehicle to fail an emissions test due to the potential impact on the immobilizer system, which is essential for proper engine operation.

10. Can OBDII code B3902 in a 2017 Chevrolet Silverado be prevented in the future?

- Regular maintenance, including checking the immobilizer system components and addressing any warning lights promptly, may help prevent this code from reoccurring.