HI @Jrduncan66
Welcome to community.
Based on your post, it sounds like Siri is requesting access to Pandora. To begin, I would try signing out of the Pandora app and then back in. I do recommend trying this when not connected to CarPlay. If you're still having trouble, I would ask Siri to play Pandora directly on your phone when not connected to CarPlay. It may prompt you with a notification to access Pandora.
Let us know how it goes.
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