ORIGINAL: tskatz
I took a very enjoyable 120 mile round trip in the Challenger yesterday. After about 40 miles the tire pressure warning light came on for about five minutes. It went off on it's own. I stopped at the first service station and checked all the tire pressures and they were all at 32 PSI. The light never came on again.
You probably have a sensor about fail or something temporarily interfered with the signal.