AutoCodes – GMC – B2455 2018 GMC Sierra

B2455 2018 GMC Sierra Code - Cellular Phone Microphone Circuit

Quick Answer

The Telematics Communication Interface Control Module provides the Cellular Phone Microphone with a supplied voltage on the Cellular Phone Microphone signal circuit. Common causes include Faulty Cellular Phone Microphone, Cellular Phone Microphone harness is open or shorted, Cellular Phone Microphone 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: B2455 2018 GMC Sierra indicates Cellular Phone Microphone Circuit.
Common causes: Common causes include Faulty Cellular Phone Microphone, Cellular Phone Microphone harness is open or shorted, Cellular Phone Microphone 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 453

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 Apr 26, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2455 2018 GMC Sierra Description

The Telematics Communication Interface Control Module provides the Cellular Phone Microphone with a supplied voltage on the Cellular Phone Microphone signal circuit. When the microphone is in use, voice data from the user is sent back to the Telematics Communication Interface Control Module on the cellular microphone low reference circuit. The Diagnostic Trouble Code (DTC) will be set when the Telematics Communication Interface Control Module detects a Cellular Phone Microphone Circuit failure.

OBDII Code B2455 2018 GMC Sierra - Cellular Phone Microphone Circuit - AutoCodes.com — B2455 2018 GMC Sierra Code - Cellular Phone Microphone Circuit

What does this mean?

What are the Possible Causes of the DTC B2455 2018 GMC Sierra?

Faulty Cellular Phone Microphone
Cellular Phone Microphone harness is open or shorted
Cellular Phone Microphone circuit poor electrical connection
Faulty Telematics Communication Interface Control Module

How to Fix the DTC B2455 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 B2455 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 B2455 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 B2455 2018 GMC Sierra Code

1. What does OBDII code B2455 mean for a 2018 GMC Sierra?

- This code indicates an issue with the Cellular Phone Microphone Circuit in the vehicle.

2. What are the common symptoms of OBDII code B2455 in a 2018 GMC Sierra?

- Common symptoms include malfunctioning hands-free calling features, poor call quality, or complete loss of phone connectivity.

3. What are some possible causes of OBDII code B2455 in a 2018 GMC Sierra?

- The code may be triggered by a faulty cellular phone microphone, damaged wiring in the microphone circuit, or a problem with the vehicle's audio system.

4. How can I diagnose the cause of OBDII code B2455 in my 2018 GMC Sierra?

- To diagnose the issue, it is recommended to check the integrity of the cellular phone microphone, inspect the wiring for any damage, and test the audio system components.

5. Can I repair OBDII code B2455 in a 2018 GMC Sierra myself?

- While some basic troubleshooting like checking connections and replacing the microphone may be feasible, complex repairs involving wiring may require professional assistance.

6. Are there any temporary fixes for OBDII code B2455 in a 2018 GMC Sierra?

- Disconnecting and reconnecting the phone, resetting the audio system, or restarting the vehicle may sometimes temporarily resolve the issue.

7. Is it safe to continue driving with OBDII code B2455 present in a 2018 GMC Sierra?

- While the code itself may not affect the vehicle's drivability, it is recommended to address the underlying issue promptly to ensure proper functionality of the phone system.

8. Can a faulty cellular phone microphone cause OBDII code B2455 in a 2018 GMC Sierra?

- Yes, a malfunctioning cellular phone microphone is one of the common culprits for triggering this OBDII code.

9. Does OBDII code B2455 affect other vehicle systems in a 2018 GMC Sierra?

- This code is specific to the Cellular Phone Microphone Circuit and should not directly impact other vehicle systems or performance.

10. How long does it typically take to repair OBDII code B2455 in a 2018 GMC Sierra?

- The repair time can vary depending on the exact cause of the issue, but it may range from a quick fix to more extensive troubleshooting and repairs that could take a few hours to complete.