B2455 GMC 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 GMC 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.
Code B2455 GMC Description
What are the Possible Causes of the DTC B2455 GMC?
- 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 GMC?
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 GMC 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 GMC code?
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Need Help with the Code?
Get the B2455 GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- B2455 2014 GMC Sierra — Cellular Phone Microphone Circuit
- B2455 2015 GMC Sierra — Cellular Phone Microphone Circuit
- B2455 2016 GMC Sierra — Cellular Phone Microphone Circuit
- B2455 2017 GMC Sierra — Cellular Phone Microphone Circuit
- B2455 2018 GMC Sierra — Cellular Phone Microphone Circuit
Frequently Asked Questions about B2455 GMC Code
1. What does the OBDII code B2455 mean on a GMC vehicle?
B2455 indicates an issue with the cellular phone microphone circuit, such as a fault in the wiring, connection, or the microphone itself.
2. What are the common symptoms of the B2455 code in GMC vehicles?
Symptoms may include poor or no audio during hands-free phone calls, static or distorted sound, or the inability of the system to detect the microphone.
3. What causes the B2455 code to appear?
The most common causes are a faulty microphone, damaged or loose wiring, poor electrical connections, or a malfunction in the vehicle's infotainment system.
4. Can the B2455 code affect other vehicle systems?
While it primarily affects the phone and infotainment functions, it usually does not impact critical vehicle systems like engine performance.
5. How can I diagnose the B2455 code?
Start by inspecting the microphone wiring and connectors for damage or loose connections. Use a multimeter to test for continuity and check the infotainment system for additional codes.
6. How do I fix the B2455 code on a GMC vehicle?
Repairs may involve replacing the faulty microphone, repairing or replacing damaged wiring, or updating/reprogramming the infotainment system.
7. Can I still use my GMC vehicle with a B2455 code present?
Yes, the vehicle can still operate normally, but the hands-free phone functionality may be impaired or unavailable.
8. Is the B2455 code covered under GMC’s warranty?
This depends on your vehicle's warranty terms and mileage. For newer vehicles, issues with the infotainment system might be covered.
9. Do I need a professional mechanic to fix the B2455 code?
If you’re comfortable with basic electrical diagnostics, you can attempt repairs yourself. Otherwise, a professional mechanic or dealership is recommended.
10. How much does it cost to repair the B2455 code?
Repair costs vary but can range from $50–$200 for basic wiring repairs and up to $500 or more if the microphone or infotainment module needs replacement.
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