Hello all, just curious if there is an O2 sensor built into the passenger side cat on our trucks. I have an '06 Screw. Thanks!

 

I'm pretty sure there should be four O2 sensors on the truck total. One upstream (before the cat) and one downstream (on the cat) on each side. If I remember correctly, the driver's side is bank 2 and the passenger side is bank 1.

So in short... yes.