Hi there, MikeC6GS!
Thanks for reaching out to the Apple Support Communities! It sounds like you are having an issue with your iPhone not working properly with your car stereo through Bluetooth and I’m happy to help! I recommend taking a look at this article with steps to follow to Get help connecting your iPhone, iPad, or iPod touch with your car stereo.
- Check your car stereo's user manual for how to pair with a Bluetooth device.
- Go to Settings > Bluetooth, and turn off Bluetooth. Wait for 5 seconds, then turn Bluetooth back on.
- Restart your iOS device.
- On your iOS device, unpair your car stereo. On your car's display, unpair your iOS device and any other devices. Restart your car and your iOS device, then pair and connect again.
- Update your iOS device.
- Install any firmware updates for your car stereo.
- If you still can't connect, contact Apple Support.
This article has the best troubleshooting steps you can take, as well as the next steps to follow if the issues continue.
Take care!