OK, just a lil cornfumed here... I was led to believe the TMPS sensors activated (transmitted) when the centrifugal forces resulting from the rotation of the tires while driving acted on the switch and if the pressure was (as stated earlier) 25% below setpoint, they indicated on the dash that one of the tires (could even be more than one) was low. So, if this is true, how does a signal transmit if the car is in storage (not driven)? I just get so cornfumed.....