I was under the WJ changing the transfer case fluid and while I was there I decided to check out the O2 sensors. I'm not getting any codes or anything...but I can't seem to locate any sensors along the exhaust at all?
Also, the 2.7 has a cat? I note there is a smallish sleeve not far along the pipe that has some type of metal gauze covering it. I assume this is the cat?
UPDATE...and a bit more research on my behalf reveals diesels generally don't have O2 senors