Fiat UP Hands-free Calling Dead Despite Working BT Music

I experienced similar issues on my 2019 Polo TSI. The wireless connection for music worked fine but the voice recognition and hands-free calling stopped functioning. Initially thought it was just a microphone fault. Turned out the main control module for the audio system had a defective circuit that specifically handled voice processing and phone integration. The ambient noise compensation system was also affected. When tested at the workshop, they found multiple stored error codes related to the infotainment communication bus. The volume control still worked for music but the entire voice processing unit needed replacement. This was more serious than expected since it required programming and coding of the new module to match the car systems. This repair required specialized diagnostic equipment and about 4 hours of work including testing. The dealer had to order the part which took several days to arrive. After replacement, all functions were restored including phone integration and voice commands. Would recommend having it properly diagnosed with professional equipment rather than assuming its just the microphone. These issues often indicate a control module problem rather than just a simple component failure.

Thanks for sharing your experience. Your case sounds exactly like what I am dealing with, especially the part about music working but voice features failing. I have booked a workshop visit next week since it seems this needs proper diagnostic equipment. Just wondering, do you recall roughly how much you ended up paying for the module replacement and programming? Also, has everything worked flawlessly since the repair or have you noticed any other audio system quirks? Would be really helpful to know what to expect cost-wise and if the Bluetooth issue was permanently resolved.

Had the repair done last month and can confirm everything works perfectly now. The speech recognition and hands-free functions are back to normal and volume control operates smoothly across all audio system features. The total cost came to 815€ including the new module, programming, and labor. The Bluetooth issue was completely resolved, no more problems with phone calls or voice commands. The microphone repair was actually part of the larger infotainment system replacement since they discovered the original unit was defective. The investment was worth it since the system now works as intended. No audio quirks or connection problems have appeared since the fix. The workshop did a thorough job testing all functions before returning the car. One tip: make sure they perform a full system test after the repair to verify all communication features are working properly. This includes checking both incoming and outgoing call quality through the hands-free system.

I finally had the car checked at a different workshop yesterday. Turns out you were spot on, they found similar issues with the control module. My case also needed a full system replacement with programming. The final bill was 780€ which seems in line with what you paid. They installed the new unit and ran complete diagnostics on all audio input systems. The voice recognition and phone integration are working perfectly now. Even the sound quality during calls seems better than before. The mechanic explained everything clearly this time and showed me the test results. Much better experience than my previous attempts to get this fixed. They also updated some related software while the system was being worked on. Really glad I asked here before spending more time with basic troubleshooting. Sometimes these audio system problems need proper diagnostic equipment to identify the real cause. The Bluetooth issue is completely resolved now and all functions are back to normal.