AutoCodes – Chevrolet – B302A 2018 Chevrolet Silverado

B302A 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 230

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Mobile Telephone Communications Interface Requested Immobilization - AutoCodes.com — B302A 2018 Chevrolet Silverado Code - Mobile Telephone Communications Interface Requested Immobilization

What does this mean?

What are the Possible Causes of the DTC B302A 2018 Chevrolet Silverado?

Contact OnStar

How to Fix the DTC B302A 2018 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 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 2018 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 B302A 2018 Chevrolet Silverado code?

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Need Help with the 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 B302A 2018 Chevrolet Silverado Code

1. What does OBDII code B302A mean on a 2018 Chevrolet Silverado?

Code B302A indicates that the mobile telephone communications interface has requested the immobilization of the vehicle, which may involve the theft deterrent system or a malfunction in related communication modules.

2. What are the symptoms of code B302A on a 2018 Chevrolet Silverado?

Common symptoms include the vehicle failing to start, security warning lights on the dashboard, or issues with remote start functionality.

3. What causes code B302A to appear on my Silverado?

This code can be triggered by a malfunction in the mobile communications interface module, a fault in the theft deterrent system, wiring issues, or software glitches.

4. Can a weak battery cause code B302A on my Chevrolet Silverado?

Yes, a weak or failing battery can cause communication errors between modules, potentially triggering this code.

5. How do I diagnose code B302A on a 2018 Chevrolet Silverado?

Begin by checking for other related codes, inspecting the mobile communications interface module, verifying proper wiring connections, and ensuring the battery is fully charged.

6. Is B302A related to the theft deterrent system on my Silverado?

Yes, this code is often tied to the theft deterrent system as the mobile communications interface may request immobilization due to a perceived security threat.

7. Can I drive my Silverado with code B302A active?

If the vehicle starts, it may still be safe to drive. However, addressing the issue promptly is recommended to prevent potential immobilization.

8. How do I fix code B302A on a 2018 Chevrolet Silverado?

Possible fixes include resetting the theft deterrent system, updating module software, repairing faulty wiring, or replacing the mobile communications interface module if necessary.

9. Does code B302A require a dealership repair?

While some fixes like software updates might require a dealership, basic diagnostics and wiring inspections can often be performed by a qualified independent mechanic.

10. Is it expensive to repair code B302A on my Silverado?

Repair costs vary depending on the root cause, but resolving wiring issues is typically less expensive than replacing the mobile communications interface module.