Replaced stock alternator about a month ago. Carquest brand New not Rebuilt. My brother in law's mechanic shop uses Advanced Auto for all their parts so I get a deal on parts going through his account. I replaced it myself, no big deal. My Charging System and battery light will come on while driving, for a minute or so, then goes away. This happened several times on my 22 mile drive to work this morning. Came on once 2 days ago then didn't happen again until this morning.
I have a Bama...

P0622 Code 06 GT 4.6L