2010 Hyundai Sonata • 4 cylinder 2WD Automatic • 35,000 miles

Ok, my mom's car had the TPMS warning light on so she went in and the guy said she had a little nail in her tire. They plugged it or patched it (not sure which). This morning she went out to get in the car and the light came back on. She is supposed to be taking a 630 mile trip today. What should she do? Should she get a new tire? Just fill all the tires with air? Is that plug/patch safe over that kind of distance?
April 2, 2011.

If the same tire was low, they didn't fix the tire or there is a different hole too. If the tire is in good condition, take it back to the shop and have them recheck it and properly repair it.