MABrown

I tried to get my Navion ready for a trip this weekend and discovered that the main starting battery had died. Put it on a charger and restarted the engine and it runs fine. Problem is that I can’t engage the transmission in drive or reverse. Displaying need service on the dash. Also a problem with the adaptive cruise control system. The Navion is a 2022 model with less than 5,000 miles on the odometer. I am new to RV ing and I guess I am learning the hard way.
I think it must be a computer...