It IS a dumb system, if any sensor indicates pressure too high OR too low, the light comes on. THEN, you must use a pressure gauge to find the one that is in alarm.

Also, when the battery in a sensor finally goes dead, the receiver will eventually realize it is not hearing from that sensor, and light the light. THAT is where is it hard to figure out. The conclusion everyone has come to is simple; If they are original, and one goes, the others are about to - so the thing to do is to replace all of them; you are then good for 5-10 years.

I have not had a car with them in over three years, my SE is a base model, so I don't keep up with this. The definitive answer is provided by Clint in Detroit (Crossfire owner and retired Chyrsler Engineer). He wrote post about this on Facebook. Let me see if I can find it and post it here..