the CEL on my 07 4cyl ex came on this morning. Car runs fine. I'm going to Autozone in a bit and have them scan it. I also unscrewed the gas cap and screwed it back on tight. I might disconnect the battery and reconnect to reset the light and see if it comes back on (I read that resets it).

Am sure this has been asked many times but I would appreciate your thoughts. Thanks

 

Turns out must have been just the gas cap. CEL did not come back after driving around for at least an hour.