Hey Jerkules. I have a 2006 Caddy DTS. It has air pressure sensors in the wheels. My right front tire won't hold air for more than a couple days. Have had it checked numerous times and no leak can be found. They say inevitably that the rims are a little corroded possibly and the air is escaping around them. They have reseated the tire a couple of times. Can the air pressure sensors have anything to do with this ya reckon. The car is up for sale by the way. Only 57,OOO miles and clean condition. Asking 9500. Its loaded and red with chrome wheels. Sharp looking car.