I've been having the notorious 301(sometimes 302) code for sometime now. Now I've read a bunch of threads and googled it. One of the possible causes is a bad O2 sensor. This is where I need help. My 00' Sahara does NOT have the California mini cats emissions. So when I talk to my local dealers all they can do is read the parts manual n tell me that there's 4 O2 sensors in it. I only have the two in the exhaust pipe one before and one after the cat. So would the one before the cat still be considered the "upstream" sensor or not?
I've already bought an Mopar upstream just made me really nervous cause I had to fight w them that I only had the two. One place asked for VIN #s to assure the right part and another said that didn't matter. Unfortunately I went w the second place cause it was way closer. I asked to see what n where these 4 O2 where n he just printed it out of the service manual. It's the same one I have in my Haynes. Guess I shoulda asked to talk to a mechanic instead of a parts guy. I just felt that I knew a lot more about jeeps than he did. So it was spendy and I'm having a hard time getn her out. My neighbors got a lift n a socket for it so when he's not busy I hope I can get it changed out. Thanks for ur help guys. Makes me feel a little better bout the part