my light has been OFF somewhere around 7 days i've owned the car, 7 or 9. its always on, like a night light, it brings me comfort.....
since i dont' have my own diagnostic i was going to have them run it at my dealership, but no, thats $120 just to run it. so i said "oh come on, i still get great mileage and great performacnce" and they guy said "yeah its probably just emissions, don't waste your money."
end of story.