i was driving my '06 yesterday when i saw the tire pressure warning light come on - it was flashing at first, then it stayed on. i thought i had a tire losing air, but when i reached my destination, i checked and none of them were. i checked the manual and saw when it flashes first, it means it's a system malfunction. just the day before, i had maintenance done at the local dealership and one thing they did was rotate the tires and patch one of them because it had a nail in it. could the rotation or repair have caused the malfunction? i know it could be the system just happened to go bad at that time i was driving. has anyone had a malfunctioning TPMS repaired or replaced? i'm wondering if this is going to cost me big bucks. thanks.