For my 07 I have the 1st and 2nd 02 sensors still in and plugged up but with Tom's Tune he disabled my 3rd sensor and that's where I have my Wideband sensor at . And this is on a Duratec 2.0L .
I got a CEL when I put my Wideband in cause my 3rd 02 sensor was still active and now its disabled and no more CEL :)
Team Duratec #01,Sedan Revolution#4, Elder FocusedSlayer, Gump Crew 21
February 2012 Sedan of The Month