so I have had the same issue but I was unsure how to fix this but I have some recommendations on how to fix it If your Android Auto keeps disconnecting or isn’t working in the car, there are a number of possible explanations, including:

You may be using a car or smartphone that’s not Android Auto compatible. You may have software issues, including an outdated Android operating system or Android Auto app. You may have a bad wired or wireless connection. You may be using a faulty app. You may be trying to connect Android Auto to the wrong vehicle. You may have changed some settings that affect your Android Auto connection.

And definitely Make sure your phone, car, and apps are compatible