I had the same issue in my 98 cobra, my tuner tuned out the sensors but I kept throwing the o2 sensor code after the car would be running for awhile. Tried the simulators and the code still kept coming up. Never figured it out though.
Well, I don't know any of you guys yet, but would you mind letting me tag along for this one? Don't know for sure my schedule yet but I don't think I will have to work that day.