faulty Service Engine Soon light?

was driving down the highway today going about 70mph when i noticed the service engine soon light was on, and stayed on the rest of the way home. i wasnt driving in any bad way. i didnt notice anything wrong with the car either.

anyone have experience with faulty service engine soon lights? (car is at 27,500 miles)

you may have a bad o2 sensor...

it's been my experience that those don't usually come on without a problem of some sort... I agree, O2 sensor may be loose.. I wouldn't think it's bad with only 27k but....