B127C 2016 GMC Sierra Code - Microphone 2 Input Signal Circuit
Quick Answer
The active noise cancellation system uses three microphones in the vehicle headliner: one above each front seating position, and one above the rear seat. Common causes include Faulty Radio Volume Compensator Interior Noise Microphone, Radio Volume Compensator Interior Noise Microphone harness is open or shorted, Radio Volume Compensator Interior Noise Microphone circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B127C 2016 GMC Sierra indicates Microphone 2 Input Signal Circuit.
- Common causes
- Common causes include Faulty Radio Volume Compensator Interior Noise Microphone, Radio Volume Compensator Interior Noise Microphone harness is open or shorted, Radio Volume Compensator Interior Noise Microphone circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B127C 2016 GMC Sierra Description
What are the Possible Causes of the DTC B127C 2016 GMC Sierra?
- Faulty Radio Volume Compensator Interior Noise Microphone
- Radio Volume Compensator Interior Noise Microphone harness is open or shorted
- Radio Volume Compensator Interior Noise Microphone circuit poor electrical connection
- Faulty Audio Amplifier
How to Fix the DTC B127C 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B127C 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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Frequently Asked Questions about B127C 2016 GMC Sierra Code
1. What does the OBDII code B127C mean on a 2016 GMC Sierra?
B127C indicates an issue with the Microphone 2 Input Signal Circuit, which means the audio system is detecting a fault in the secondary microphone connection or signal.
2. What are the symptoms of code B127C in a 2016 GMC Sierra?
Common symptoms include poor voice recognition performance, issues with hands-free calling, or inoperative voice commands.
3. What causes the B127C code in a GMC Sierra?
The code can be caused by a faulty microphone, damaged wiring or connectors, or an issue with the infotainment system module.
4. How do I troubleshoot code B127C in my 2016 GMC Sierra?
Start by inspecting the microphone wiring and connectors for damage or loose connections. Test the microphone for proper functionality and check for software updates for the infotainment system.
5. Can a faulty microphone trigger the B127C code?
Yes, a faulty microphone or poor connection in the Microphone 2 circuit can trigger the B127C code.
6. Where is Microphone 2 located in a 2016 GMC Sierra?
Microphone 2 is typically located near the headliner, often integrated into the overhead console or near the rearview mirror.
7. Can a software issue cause the B127C code?
Yes, outdated or corrupted software in the infotainment system can occasionally cause the B127C code to appear.
8. Is it safe to drive with the B127C code active?
Yes, it is safe to drive, but hands-free and voice command features may not function correctly until the issue is resolved.
9. How much does it cost to fix the B127C code in a 2016 GMC Sierra?
Repair costs can vary but typically range from $50 to $200, depending on whether you need to replace the microphone or repair wiring.
10. Can I clear the B127C code without fixing the problem?
Clearing the code without addressing the root cause will only temporarily remove it, and the issue will likely return.
Discuss the causes and fixes for B127C 2016 GMC Sierra OBDII Code
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