Originally Posted by eugopnosaj
Mine has a front, and a rear o2 sensor, its in the wiring diagram and if you google it it comes up on diagrams of the exhaust system
On further googling I found this:
Seems the front is 100% needed, but I can remove the one after the CAT when I take it out of the exhaust system.
That's a great piece of information. I have 2 o2 sensors as well. Thanks for bringing that up