Please see answers in BOLD after comments...
Make sure that your iPhone has the latest version of iOS.
iPhone is always updated to latest ios.
1: Check your connection to your CarPlay stereo:
If you have a wired connection, try connecting again with a different USB cable to a different USB port if you have one.
Mine is always wired, Bluetooth is turned off on stereo, i've tried 3 different cables.
As soon as I hit "Emergency" selection, it connects and charges normal.
OR, sometimes I have to re-boot the iphone to get it to connect. Never had this problem until several months ago after a certian IOS update.
If you have a wireless connection, make sure that Bluetooth is turned on on your iPhone under Settings > Bluetooth. Then go to Settings > Wi-Fi, and make sure that Wi-Fi is also turned on. Tap the CarPlay network, and check that Auto-Join is turned on.
I never had this problem until several months ago, it just started happening after a certian IOS update.
I don't use Wi-fi or bluetooth in the vehicle
2: If CarPlay doesn't activate automatically, look for the CarPlay logo on your car's display and select it.
3: Restart your iPhone and your car.
I shouldn't have to do this everytime... it seems now I have to.
4: Make sure that Siri is on.
It always is on.
5: If your iPhone isn't detected by CarPlay, make sure that CarPlay isn't restricted. Go to Settings > Screen Time > Content & Privacy Restrictions. If Content & Privacy Restrictions is on, tap Allowed Apps, and make sure that CarPlay is enabled.
Again, this never happened before, until a certian IOS update.... not sure which one, but it was a few months ago... Thousands of other iphone owners are reporting same problem.... its a glitch in the iphone software!
6: Go to Settings > General > CarPlay, tap your car, then tap Forget This Car. Then set up CarPlay again.
Did this, but it still happens.
7: Make sure that your CarPlay stereo is using the latest firmware from the car manufacturer. Check your car's manual for more information.
I have the latest updates on Carplay