Where does the O2 sensor wires come from for the rear O2 sensor after the cat. My 98 civic has a hi flow cat, catback, and a header, but whoever installed the cat removed the O2 sensor, and now I can't seem to find the wires for it so that I can install an O2 sim to remove my check engine light.

Thanks

 

Anybody????

 

It should be 4 wires coming directly out of the underside of the car, above where the o2 sensor plugs into the cat. Just feel around in there, maybe they cliped them up so they'd be out of sight. I just hope for your sake they didn't cut the wires

Are you only running one o2 sensor right now?

 

From looking under the car when I changed the oil last week, there weren't any wires hanging or clipped anywhere under the car, so I suspect that they were pulled back up into the floor. And yes right now it is only running on one O2 sensor. Just to make sure do the O2 sensor wires come out from under the passenger side seat?


Thanks