Did the 6th generation DX hatchbacks (OBD-IIa ('96)) have a secondary O2 sensor?

I thought all '96+ civics did, but I can't find ANY wiring for a secondary O2 sensor in this car...he's asking me why it's throwing a CEL - it's quite simple - he's using an OBD-II GSR ECU - and there's no secondary O2 sensor or knock sensor there. I already wired up the knock sensor and it shut that CEL off, but as for the O2, there's no existing wiring, and that just confused the hell outta me. I gotta get the pinouts and such..but it's bothering me:

Did '96+ DX's have secondary O2's?

 

Are you sure it's a 6th gen Civic?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Syndacate &raquo;</TD></TR><TR><TD CLASS="quote">Did '96+ DX's have secondary O2's?</TD></TR></TABLE>
Yes.

 

if i remember correctly...they are both up front. one before the cat and one after the cat.

i want to say look for a green/white/black (2) wire...it should be a 4-pin plug.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMFreak &raquo;</TD></TR><TR><TD CLASS="quote">if i remember correctly...they are both up front. one before the cat and one after the cat.
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thats what i thought too

 

they are, escpecially if the car has that crappy one piece exhaust manifold/cat that always cracks.
theres on on the top under the heat shield and the other is about a foot below it.
one ontop of the cat and one right after it.