Hello Soundtech1,
Welcome to Apple Support Communities. It looks like while connected via bluetooth to car and then say “Hey Siri”, driving focus is turned on. That's why you see a car icon.
For more information about this feature, please check this out: Use the Driving Focus on your iPhone to concentrate on the road - Apple Support
To get started, please back up, and update your iPhone to the latest version iOS 16.0.3 as described in the following resource:
Update your iPhone or iPad - Apple Support
If the issue persists, please reach out to Apple Support for further assistance. You can contact them using this link: Apple Support
We hope this information is useful. Kind regards.