Guys:
I have been driving my Xfire for the last 6 months and the light went on only once when it was about 45 degrees F. It was down a couple of pounds. No problems since and I have seen -12 F so far. I am going to drive all winter so I will let you know. Stan37, I think your advice is sound and I will use it if a problem comes up in the future with my car.
Thank You