NHTSA Complaint #11519958 — 2017 FORD F-150

The vehicle was purchased back in March and was parked in my driveway for about a month between uses. When I drove it again, I had the "Charging System Service Now" alert pop up on the screen. This was not present when we left the dealership, and they were not willing to help me solve the problem. I checked it with a code reader at home, but it did not generate any codes. I put the battery on a charger, but it was fully charged in 5 minutes. I took the vehicle to an auto parts store to have them check the battery and alternator, and everything checked out. The serpentine belt is not warn and the fuse for the alternator was still intact. We tried discharging the PCM, but that did not solve the problem either. I am asking around at a few mechanic shops for possible solutions to try and avoid taking it to the dealer.