I just put a set of snows & rims on I bought from Craigslist for my 09 Mustang. My car is supposed to have TPMS system and I expected to see it flash an error. It is possible that the used set I got has sensors in them but one of them was a little low in pressure (25 psi) when I went to the gas station to top them off. Couple of questions here. 1) I have a TPMS light on the dash when I start the car up but what pressure does it go off at? What does a tire have to go down to, to set the system off? 2) Is it possble the tires I got already had sensors in them that work with my car (if a sensor is set for one car does it work on any SN197 Mustang)? 3) If it goes off, does one really need a reset tool? Thanks in advance. Ben
