B127D:02 Code - Microphone 3 Input Signal Circuit Short to Ground
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
- B127D:02 indicates Microphone 3 Input Signal Circuit Short to Ground.
- 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 B127D:02 Description
What are the Possible Causes of the DTC B127D:02?
- 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 B127D:02?
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 B127D:02 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 B127D:02 Code
1. What does the OBDII code B127D:02 mean?
The code B127D:02 indicates that Microphone 3's input signal circuit has a short to ground, meaning the electrical signal is being interrupted or directed incorrectly.
2. What are the common symptoms of code B127D:02?
Symptoms may include poor voice recognition performance, inoperative hands-free calling, or reduced audio quality during voice commands.
3. What causes the B127D:02 code to occur?
The code can be triggered by damaged microphone wiring, a shorted microphone, faulty connectors, or a malfunctioning audio control module.
4. How can I diagnose the cause of code B127D:02?
Start by inspecting the microphone wiring and connectors for damage or corrosion. Use a multimeter to check for continuity or a short to ground.
5. Can a faulty microphone cause the B127D:02 code?
Yes, a defective or internally shorted microphone can cause this code to register.
6. Is it safe to drive with the B127D:02 code?
Yes, it is generally safe to drive, but hands-free calling or voice command features may not function properly.
7. How do I fix the B127D:02 code?
Repairs may include replacing damaged wires, fixing or replacing connectors, or swapping out the faulty microphone.
8. Do I need to replace the audio control module to fix code B127D:02?
Replacing the audio control module is rarely necessary unless it has been confirmed as the root cause after ruling out wiring and microphone issues.
9. Can a software update resolve the B127D:02 code?
In rare cases, a software update or reset of the audio system may resolve the issue, but hardware checks should be performed first.
10. How much does it cost to repair the B127D:02 code?
Repair costs vary depending on the issue. Replacing a microphone typically costs $50-$150, while more extensive wiring repairs may cost more.
Discuss the causes and fixes for B127D:02 OBDII Code
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