My TPMS light came on a few days ago. I went ahead and checked my tires I found out that 2 were about 3 PSI under what they should be. I quickly added air (38PSI) and the light is still on. Anyone have any suggestions? I figured at first that maybe I needed to drive the car for a while and the light would go off. I have driven the car for over 50 miles and started the car about 5 times now. Any suggestions?