Is there any other settings I may be missing other than WBO2 sensor type and Average? Problem is Driver side was lean, Passenger side was rich. Swapped sensors side to side, and lean condition moved with sensor. Not sure which is faulty, if any. Got a replacement WBO2 sensor and it didn't fix the issue. I have yet to look at what it's doing now, but was told it's doing same thing with new WBO2 sensor on either side. NTK WBO2 sensors. It's a fresh start so have no data to know if it's actually lean or rich.