Tire pressure monitor susceptible to corrosion from road salt and can blow out valve stem rapidly deflating the tire. we had just returned from a trip with the vehicle and parked it at home when a short time later the valve stem had blown out deflating the tire.
Tire pressure sensor gauges are corroded and have failed on three wheels in the last three years.
While driving the low tire press warning came on after pulling into service station, approx 2 blocks pressure in tire was 25# when attempting to add air the valve stem end fell off exposing the shrader valve. after taking to dealer they replaced tire press monitor module under warranty. aapprox 6 months earlier i had a low air press warning on a different wheel and after driving about 1/4 mile home inspection showed valve stem was gone, dealer replaced press sender unit and tire at my expense. xc70 has tj24767 dated dec 2011 that addresses tpms nut corrosion. when dealer was question if this applied to xc60 was told they seldom see this problem but would not replace monitors. *tr