MB Doc - wouldn't the gas mileage suffer if it was the O2 sensor?
I fully intend to take it in as soon as I can get an appointment. You do not know anyone that can scan one on a weekend do you? I would be willing to drive to Atl. to get it done.
I was out detailing it this morning and found the sensor in the cross over pipe from the air cleaner box was extremely dirty. Cleaned it up and will see if this makes any difference over the next day or two. My gut feeling is that I screwed up the O2 sensor by running the fuel injector cleaner through it.