Originally Posted by
TiredRetired
So if I am reading the service manual correctly and with what others have said here, the light should not have come on while in storage. Not until I drive the car over 20 MPH, which I would never have done without checking tire pressure before leaving the driveway anyhoo.
Important to note, my wife's Sebring TPMS will activate a low tire warning without moving first. More than once I have started her Sebring and be greeted with one or more tires in alarm mode. Also noteworthy is the lights would not go out until we drove the car. This system has individual warnings for each tire and also indicated the pressure on the dash. Much more fancy system than we have on our Xfires so I am sure I am comparing apples to oranges here.
This then would seem to indicate I have other issues. Specifically a Low or dead battery in one or more sensors maybe?? Would that manifest itself while in storage or would that need the 20 MPH rotation to light the warning?
Oh well, makes for good conversation on a snowy day anyhoo. I will pump up all tires to 32, drive the car like hell and see what happens come April. Light stays on after that I pull pin #2 and relocate it to space #6 on the connector. Problem solved.
Yeah it could be a couple of things, so correcting the pressures and taking her for a spin will at least provide you help in troubleshooting. If you have a dead battery in a sensor or a malfunctioning TPMS SYSTEM it will help isolate a little. Since it stores (the TPMS head) a number of codes, you have to do at least one trip to correct/isolate if one tire on a previous trip was low/beyond settings. Once you make sure the pressures are correct, a drive of over 20 for a minimum of 2 or so minutes should eliminate a actual low or critical reading and reset. If it is a bad battery or problems with communication, your not going to see a resolution. Oh, don't forget a minimal battery/batteries in the sensors. They are the kinds that when they warm up to a higher temperature (in cold weather places) they will provide minimal sufficient voltage/current to operate correctly. But then when they get colder again, POOF you get erratic indications (if system is nominal). Its a good read there in the service manual, I suggest you review it and understand its operation (unique) to the XF platform. Not all TPMS systems/hardware are the same, and unless the same system/programming hardware/software in installed in both cars, they results may be different.