I changed to 19/20 Cray wheels and finally got around to having new sensors installed, during the time I had the wheels on without sensors I would just hit the reset when I started the car and the low pressure warning would be gone, recently the warnings would come up all the time so everytime I drove the car i spent most of my time pressing the reset which obviuously was driving me nuts so a couple of days ago I had brand new sensors installed. I found the procedure to marry them up to the car but no matter how many different magnets I tryed ( I used one that was supposed to hold 65 lbs!!!) I could only get one wheel married up (You know it is because the horn will blow), that wheel now read 32PSI while all the others read 22PSI. I tryed moving the magnets all around the valve stem with no luck. The only good thing that happened that night is I ended up talking to a forum member (old55) after I posted a thread about this problem. After I got off the phone I gave up working on it and I forgot I left the key in the ignition in the run position so today I decided to take a ride and after i charged the battery I started the car up and got no tire pressure warning!!! When I brought up the tire pressure readings all the tires had no air pressure reading, they were blank! I drove the car for about 35 minutes and never got a warning on the HID and the readings stayed blank. When I got home I started the car up about a dozen times and never got a warning on the HID or the dash readout and the tire pressure readings still are blank. Anybody have this happen or know whats going on. At one point I thought I might have had 3 out of 4 sensors bad but now that everything has changed I dont have a clue. TXS Tom