B0450
Microphone Circuit
The infotainment system has detected a fault in the hands-free microphone circuit. Voice commands and phone calls may have poor audio quality.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: easy
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
Ordered by how often each turns out to be the cause.
- Microphone failedCommon
- Wiring open or shortedPossible
Parts involved
- Microphone
- Infotainment Module
B0450 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.