Ever since the update last year, my Android Auto disconnects after a few minutes and keeps flashing with a phone error message. All other phones work fine, I have bought numerous cords; deleted and reinstalled, etc. Samsung said to contact Google! Lol. Surprisingly, no response from them! Lol
Android Auto and any issues with it are completely Google's to handle. It is part of the Android operating system, not part of Samsung's OneUI, and as such all issues should be directed to Google support.
How did you contact Samsung? By phone or by putting in an error report? Although this would normally be a Google issue, you mentioned it was coming up with a phone error. Next time you get that error, within 15 minutes send an error report with your logs to the Samsung developers. It may very well be some conflict with your phone, the update and AA. https://us.community.samsung.com/t5/Tips-Tricks/How-to-Send-Feedback/ba-p/3001692
