Ok here is the deal. I had an oil change and tires rotated at the Ford dealership and I was getting horrbile gas mileage afterwards. Well come to find out they rotated the tires and didnt fix my tire pressure I was getting 16 mpg with the wrong tire pressure. So transit drivers always check those tires after a rotation. Even though the dealer screwed up and they had it backwards with 49 in the front and 36 in the back it didnt make my low tire light come on. So I fix it myself and set the pressures to the correct 49 in the rear and 36 in the front. When I was done I couldnt make the low tire pressure come off the dash which came on while I was fixing the tire pressures. This is what fixed it. I looked in the manual and their is a procedure to reset your TPMS and once I did that the light went away.