Can’t connect to car Bluetooth

I’ve been using my LPIII for a little over a week now, but I can’t seem to get it to pair with my car’s Bluetooth. It ‘pairs’ through a standard phone pairing process and shows on my cars ‘device list’ but on the phone itself it still says there are ‘no known devices’ under the Bluetooth screen and it’s driving me crazy. Really just want to be able to make calls while driving.