I have 06 H3 and mine was coming on Serv TPM.had it at dealer they said it just needed reset.they did it for about 10 bucks.it was good for a long while.then I got new tires now it comes on only when I drive at higher speeds for an extended period of time.then about a month go it got real cold here like 0 degrees.Low Tire light came on and will not go off.must have a bad sensor.all tires are right on pressure.i think those sensors go whacky sometimes there more trouble than there worth.

 

My problem started shortly after a tire change, then my wife told me that when she fills up, the light goes off. Today the light was on so I stopped and loosened the gas cap then put it back on, the light went off. Could there be something in the fuel system that is setting off the warning? Really weird.