Quote:
Originally Posted by Snowflake
Well, thanks for the reassurance. I just called the shop and they told me to bring it in and they'd check it. You'd think this would have shown up yesterday when I was driving home? Not sitting on the street overnight.
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The measurements that trigger the check engine light (well, one of the measurements, there's a whole litany of conditions that trigger it) are averages of readings taken each time you start your car. So it takes a start-up or two for the light to trigger if, say, your gas cap is loose, and it takes a start-up or two for it to go away once you fix the problem (unless someone goes in and manually resets it).