i know ya'll are tired of seein these o2 sensor threads but i cant seem to find the answer.. I'm looking for the harness for o2 sensor after the cat.. everything i been able to dig up is either for cali spec or tells me to just follow the wire, But the wire goes through a grommet under the drivers seat. And Then i lose it.. I'm trying to install an o2 sim to get rid of my P0138 nad p0139.. Thanks in advance..

 

Nobody knows?

 

Search is your friend

 

i've read that page several times.. it shows locations for the cali spec.. I know where the o2 sensors are and the harness's for the primary's But cant find the harness for the secondary..

 

1. From linked document above, see Page 4 Figure 2: O2 Sensor Location - 2000 Federal Maxima, post cat O2 is Bank 1 Sensor 2 (or HO2S2-B1) or the one with the white shroud.

2. From linked document above, see Page 5 Figure 4: O2 Sensor Connector Location, locate Bank 1 Sensor 2 (or HO2S2-B1) with the white shroud/harness, as it says in the diagram.

 

Ok i'll Post a picture so ya'll can see why im not finding it..
the one on the left has the blue shielding, One on right has no shield and it runs down to the trans.. Nothing their with white.. So where else? the black one is near the passenger strut.. So all im missing is the white

 

Did some investigation. According to the service manual. This harness is located by removing that grommet. Lets see if this pic works:

 

Figures.. I tried to take the grommet out but it didnt move.. Guess i'll give it some more force.. thanks

 

I have my sim hanging outside the cat... I have it tied to a grounding bolt and wrapped in plastic bag... Been there for months now...

 

thats what i was thinkin bout doin.. The sim i have says its water proof, But doesnt look like it.