2024 12v Battery Charging System Malfunction

Anyone have this issue? First time it came on was at the dealership when I bought it. It only comes on after 20-30 min of the truck being on and 2 different dealerships can’t figure it out. They say it doesn’t have any stored codes, they’ve tested the alternator and battery and both are fine, and basically said I need to bring it in while the error is on so they can plug it in and have Corporate remote in to diagnose… It has 320 miles on it.

 

had the same issue also at the dealership during pick up. I don't know what they did, but they said they did a "reset" of the vehicle and/or battery. Took them about 30mins. Almost sounded like as if they were rebooting a computer or something.

Gluck. I'm surprised the dealership couldn't figure out the issue unless it's a bigger problem than that?