Yes, had a similar problem driving through Flagstaff last week. TPMS sensor light came on after driving 07 Optima on interstate over an hour in the early morning and parking car a short while for breakfast. Light came on while driving off. (Cold morning in high 30's F range at around 8000 feet altitude.) Checked all tires, one was low, filled it to spec, but light did not go out until after about 15 minutes of driving down I-40 and down the mountain. If your problem persists, you do need to have it checked out at your dealership. TPMS uses radio transmitters in your tire valves and one could be faulty. I recall seeing a TSB for techs to check the tire pressures at delivery and mentions cautions to owners regarding cold ambient temps that will likely cause the warning light to come on. You still need to check your tire pressures yourself on a regular basis with a reliable gauge, as air tends to find its way out of your tires over time anyway, and you are responsible for checking it, just like you should always personally check all your fluids under the hood on a regular basis, just to be safe, especially when driving long distances.