Perhaps “forget” your car in the CarPlay settings and re-add?It seems that this build has broken my ability to connnect to CarPlay wirelessly and with a cable. It worked fine on 17.2 prior to the update albeit it had the occasional disconnect and reconnect issue. Now it won’t connect at all and I get an error message in my vehicle. I tried my other phone, running 17.2, and it works fine.
Wired Carplay has been working well for me with iOS 17.3 DB1.