My wife's 2008 tire light also comes on occasioanlly. So much, we started getting concerned. We took it for a spin and here comes the light on again. I pulled over and read in the manual that this is normal. So I took my tire gage out correct the air, both front and rear, and started to contnue down the road. Before ending the drive the light came on again, and I was baffeled. I to thought it was the gage. I took it down to my tire expert here in town and he told me that when driving long times and curvy roads with this heat the tires will actually expand. He took a little air our (not much) and now we have not seen the light come on. Just thought I would pass this on for you "just weekenders" divers out there. ENJOY the ride.