FWIW, just recently got the SES light. Figured I'd just swing by the indy to have him scan it - assuming emissions whenever I was passing by his part of the hood . Happened to fill up tank the following day and the light went out...

Then SES started occasional flicker this weekend, so that was not a good sign. Same day, misfire, engine running rough at times...

Dropped it off at the Indy. I'll let him smoke it out and figure out if it's a intake issue or coilpack. Had him do the sensor while he was in there. Doesn't BS and charge me a diag fee so it's all good. When I can avoid it, I don't like touch the plate ;-/