I have a 2006 Mazda 3. One Morning I was backing out of my driveway and the Power steering was not working. It was hard to turn at all. The Power steering light came on in the dash board, so I let it be. Later that day I tried to drive it again an it was fine, so I thought nothing of it. This morning it did it again, but now in the afternoon its fine again. Could it be the cold?, the Battery?