Can't send or receive calls thru car bluetooth

[AC Question]

I upgraded to Lollipop 5.1, deleted my phone from my car, repaired them, car finds my phone, says it's connected but nothing comes through my speakers

 

[Rukbat]

Check with the car dealer's service department to see if they have an update to the car's audio system. Changes in the phone have to be matched by changes in the audio system.