Suddenly my phone won't connect to my car's Bluetooth eventhough it was paired forever ago. I tried deleting the car from my phone and reconnect, but that wouldn't work.

And here's the strange part: I tried deleting my phone from the car's Bluetooth Devices List but whenever I try it shows the message "Bluetooth is busy". When I try to Pair New Device the screen shows the pairing code, but no cellphone [mine or other] can discover my car's Bluetooth. If I try to simply reselect my phone off the already paired devices list the screen says it's searching, to no avail.

This is the first time this happens. I already tried turning the radio on and off, killing the engine, opening and closing the door with the car off, holding the off button, etc. Nothing seems to work.

The only thing I haven't tried is waiting for a long period of time or disconnecting the battery.

Any advice?

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There are issues with Bluetooth not working; right now;
I would actually just disconnect your battery (while your asleep, or whatever,)
& try that;
could just be that simple as needing to be rebooted...

 

I've had the same issue with bluetooth / Pandora. I would suggest resetting your radio.

 

all new vehicles were having Bluetooth issues fyi