[gardan69]

Mine did the same thing w/the first cool (50 degrees) snap we had in Louisiana. It chimed, scared the heck out of me, and stayed on. I tried turning off the truck and turning it back on, but it stayed on. I brought my book into my office and looked it up, low tire pressure warning light. Once my fiancee' put air in all 4 tires, it went out. The air was ~10 - 12 lbs lower than it was supposed to be. I find it hard to believe a slight drop in temp will do that, but that's the first time the light came on. But it's out now...that's all that matters.