My iPhone 16 Pro Max is not connecting to CarPlay

What happens when you try? Are you trying to connect to the same vehicle as the iPhone 14 Pro Max? Does the iPhone 16 Pro Max have the same name as the iPhone 14 Pro Max? Are you trying to connect wired or wireless? See the information in this support document. If you need help with CarPlay - Apple Support

You're welcome. I'm glad you got it sorted out. I know I really enjoy CarPlay in my vehicle.

Generally the troubleshooting begins with removing the phone from the car and the car from the phone. Try a new cable, making sure that if it is a USB-C to USB-C that it is a data cable, not just a charging cable. Then pair the device again. Make sure you follow the other troubleshooting steps in the support document that I provided.

I’ve got an issue with iPhone 13 Pro and others I know also have issues with the iPhone 14 Pro.

I can connect but it cannot read WhatsApp messages.

You're welcome. Good luck.