I've had my 159" WB for a couple of months. About 2 weeks after purchasing it the tire alarm appeared, I suppose since one of the tires was at 72 psi. Set all my tires 68 front 70 back. There's no way I'm going to ride around with tires pumped to 80 psi for no reason - sounds unsafe to me. The light continued to stay on for about another week with the tires as set 68/70 psi. Then miraculously the sensor shut off on its own. Don't know how they do it, maybe an on-board algorithm that knows you've settle on the 70 psi range and are not maxing out on the factory super high pressure? Maybe the sensor algorithm is based on having a equal pressures and not an absolute pressure? Also the van seems to ride more comfortably at 70 psi.