Newer cars have a TPMS and warn you when the pressure gets low. Now that cold weather is here,check to see that your tire is at least the recommended pressure. I forgot about it and this morning it was 7 degrees. One tire was 1 pound under and set off the warning. It would not reset after driving as it had to come up even more than driving did.
Not a major deal as I knew the pressure was adequate, but it annoys me to have that yellow light on when driving. I understand this is a common happening for the first really cold snap.