Yeah, I was pumping my 4 tires to 36 for the past 1 month and the damn warning light wouldn't go out. Figured it was the Spare but was too lazy to check it out. Finally on Christmas (cuz i had nothing better to do), I took the 4R to the local Gas station, lowered the spare and checked the pressure. It was at 27psi. Pumped it up to 36. Started the engine and within a couple seconds, the pressure warning light went out.