I am running a single 7875 Turbo on my 5.3, I ran a turbo log setup on the passenger's side. To get it to run in closed loop I need to run both upstream O2s correct? I guess my question is that will be an incorrect reading on bank number two correct? If I am running a wide ban 02s in the down pipe why are the up streams needed? I am new to the turbo world so please be easy on me. (Set up Is a 2003 5.3, gm pcm, 4l60e, 7875 single turbo)

 

In your file you could just change the injector bank selector parameter to the same side for all of them and use 1 o2 sensor for closed loop fueling. Definitely not ideal, but should work.

 

Disable the upstream o2 sensors and only use the wideband in the downpipe for closed loop

 

Thank You!