AutoCodes – GMC – B302A 2016 GMC Sierra

B302A 2016 GMC Sierra Code - Mobile Telephone Communications Interface Requested Immobilization

Quick Answer

As part of the vehicle telematics enhanced services, a request may be sent to the Body Control Module (BCM) to disable vehicle starting. Common causes include Contact OnStar. 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: B302A 2016 GMC Sierra indicates Mobile Telephone Communications Interface Requested Immobilization.
Common causes: Common causes include Contact OnStar.
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 189

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 02, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B302A 2016 GMC Sierra Description

As part of the vehicle telematics enhanced services, a request may be sent to the Body Control Module (BCM) to disable vehicle starting. If a valid message is received by the BCM requesting that starting be disabled, the start enable message will not be sent to the Engine Control Module (ECM).

OBDII Code B302A 2016 GMC Sierra - Mobile Telephone Communications Interface Requested Immobilization - AutoCodes.com — B302A 2016 GMC Sierra Code - Mobile Telephone Communications Interface Requested Immobilization

What does this mean?

What are the Possible Causes of the DTC B302A 2016 GMC Sierra?

Contact OnStar

How to Fix the DTC B302A 2016 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 does this mean?

Code Tech Notes

1. Verify the OnStar system is not damaged and is operating properly, with no DTCs set. If the OnStar system is damaged, or inoperative, or any OnStar DTCs are set These concerns must be corrected before the start disable can be removed. If the OnStar system is not damaged and is operating properly go step 2.
2. Press the blue OnStar button and ask the advisor to be transferred to the stolen vehicle team to verify the vehicle account has been updated.
3. Verify that OnStar is aware the vehicle has been recovered and that the vehicle account has been updated. If OnStar has not been notified that the vehicle has been recovered Contact the customer and advise them that for security purposes, they must contact OnStar and the law enforcement agency to update the vehicle account. If the account has been properly updated go to step 4.
4. Once the vehicle account has been updated and the start disable request has been removed, DTC B302A will transition to a history DTC. Clear the DTC history.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B302A 2016 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.

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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 B302A 2016 GMC Sierra Code

1. What are common symptoms of OBDII code B302A in a 2016 GMC Sierra?

- Common symptoms include problems with the mobile telephone communications interface, such as issues with pairing a phone or using hands-free features.

2. What does the OBDII code B302A indicate in a 2016 GMC Sierra?

- The code B302A indicates a Mobile Telephone Communications Interface Requested Immobilization issue in the vehicle's onboard computer system.

3. What are possible causes of the B302A code in a 2016 GMC Sierra?

- Possible causes include software glitches in the communication module, damaged wiring, or a malfunctioning mobile telephone interface module.

4. How can I diagnose the B302A code in my 2016 GMC Sierra?

- Diagnosing the code may require using a diagnostic scanner to retrieve the specific details of the fault, checking the mobile telephone interface module, and inspecting the wiring for any visible damage.

5. Is it safe to continue driving my 2016 GMC Sierra with the B302A code present?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential issues with the mobile communication system.

6. Can I reset the B302A code in my 2016 GMC Sierra without fixing the underlying issue?

- While you can clear the code with a diagnostic scanner, it is crucial to address the root cause to prevent the problem from recurring.

7. What are some repair tips for fixing the B302A code in a 2016 GMC Sierra?

- Repair tips may include checking and repairing any damaged wiring, updating the software in the communication module, or replacing the mobile telephone interface module if necessary.

8. Will fixing the B302A code require professional assistance?

- Depending on your skill level and access to tools, you may be able to diagnose and repair the issue yourself. However, seeking professional help is recommended for complex electrical system repairs.

9. How much does it typically cost to fix the B302A code in a 2016 GMC Sierra?

- The cost of fixing the B302A code can vary depending on the root cause of the issue, parts needed for repair, and whether you choose to do the repair yourself or seek professional help.

10. Is the B302A code a common issue in 2016 GMC Sierra vehicles?

- While not extremely common, the B302A code related to the mobile telephone communications interface can occur in 2016 GMC Sierra vehicles, especially with prolonged use of the communication features.