that turned out to be a bone head move on my part. This morning after running a few errands, I pulled out of a parking lot and noticed a horrible vibration from the engine, followed by the CEL, then the dreaded FLASHING CEL. I shut down the car and pulled over and parked. I called my wife and told her something horrible was wrong with the car. She calmly said, did you ever put gas in last night? My response was, "D'oh!"
After a few additional gallons of gas, the engine issues disappeared. Dumb ass.