Is it the Denso 2341056? Rock Auto has them for $19.94 after a 5% discount code.

I'm about to buy one for myself. When you say $60/ea I'm wondering if I'm looking at the wrong one?

 

hmm Im pretty sure mine is a 4 wire o2 sesnsor, so itll either be DENSO 2344050 or DENSO 2344056, but thanks for the suggestion, thats definitely the best deal Ive seen so far.

 

So on my drive to work today, the check engine light came on for the first time. It may be possible that on monday I jarred the o2 sensor loose during my ebrake install. Any ideas why it wouldnt have been on prior to that?

Previously all signs pointed to o2 sensor except the check engine light... Is it possible to clear an error? I wouldnt put that past the previous owner if it was.

 

Probably O2 if that's what your gut says then crawl under and make sure you didn't somehow work the plug loose or bare a wire. Easy stuff to check as soon as I put my O2 back in after header install my cel shut off after ideling for about a minute

If you just want to reset any codes you should just be able to unhook the positive battery cable and go inside a watch tv for an hour or two. Then hook it back up and you should be good to go. At least that's how it works on my 99 Chevy with a 5.3 motor

 

Alright, o2 sensor was definitely the porblem. Went from getting 400km/tank to getting 600km/tank (70L tank). Thanks for all the help!