My dash reads "Service Tire Monitor System." I bought a new tire this weekend, because I hit a pothole and ended up with a knot on the sidewall of my front driver side tire. I had the tire replaced and got "Nitrogen in all 4" thanks for the tip. The tire shop had a guy go to each tire and read the tire pressure with an electronic gadget. I got in the car and checked the dash, and reset the factorty settings but the monitoring system is not getting a reading on all four tires yet.

After all of this my dash still reads "Service Tire Monitor System." Can someone help me?

 

Howdy,
Try this, Get a good strong magnet.
Turn the ignition to on, push both the lock and unlock buttons on the remote until the horn sounds. Go to the drivers front tire and place the magnet on or as close to the valve stem as possible. Hold it there until the horn sounds again(about 15 to 30 seconds) do the same on the passenger front, passenger rear and drivers rear. In that order. After the last tire the car may beep one more time to tell you its set. Turn the key off and then back to on, the tpms should all be reset now.
Works every time on my DeVille, my girls G6 convertible and my Dad's escalade and SRX.
Let us know how it works for you.