Hi mstauss1881,
We appreciate you reaching out to us.
We’d like to gather additional details that may help us be in a better position to assist you.
- Does your car have Wi-Fi? If yes, is your iPhone connected to your car's Wi-Fi?
- If you are in the 60 mile radius from your home, are you able to ask Siri to send a message if you are not in your car?
- If possible, test the feature on a different vehicle with CarPlay. If you have had the chance to try that, let us know if you are able to replicate the issue on a different vehicle.
These details can help us in further isolating the issue.
In the meantime, let’s check for a software update and make sure that you are running the latest version of iOS.
While it isn't inherently assured that an update will resolve the issue, updating to the latest software version for your device can help isolate potential software issues.
Kindly secure a backup and update.
- How to back up your iPhone, iPad, and iPod touch - Apple Support
- Update your iPhone or iPad - Apple Support
Take care!