One of the TPMS sensors is bad. I had mine new from the dealer and about 2 weeks into ownership that little light went on in spite of the correct pressures in the tires. So the next time I was in for warranty work that was fixed. Here's my paperwork from the dealer...
My door shows 65 front 72 rear. It took a while for my sensor to go off tooAs an FYI, when we had the stock tires swapped out for same size KO2's a week into ownership it took about a half-hour and ~15 or so miles for the sensor light to go out in the dash.
Crew set tires per door sticker 65 front / 80 rear.