I have a 96 Civic DX hatch. anyway i got it and the secondary o2 sensor wiring was cut, so there is no plug, i have finally found out that it dosnt go through the floor like the ex/si model.

anyway i found where i think it should come out at the engine harness. but there is only 2 wires, one green, and one black...would the other 2 wires come from somewhere else on the harness? if someone had an extra second and could check on their car, or anything would be helpful.

 

also i found this, can someone confirm this is the wiring, if i can get the stock harness to plug n play

 

I don't have a DX, I have an EX, so I'm not sure as to how much help I can be.

Though I looked at the helms.

C782, the plug where the O2 sensor plugs into goes to plug C781, which goes straight up through the floor (in back of the cup holders to plug C432 which is on the main dashboard harness.

The location, as described in the manual:
C432:
Number of cavities: 4 (note, it's a 4 wire O2)
Location: Under middle of dash
Connects to: Secondary heated oxygen sensor sub-harness (C781).

They don't differentiate at all for trims, as far as I can tell, looks like it's in the same place, chief.

As for replacing that sub-harness and whether it's plug 'n play or not, I'm not sure. The plug is probably the same, but I don't know if the wires would be there. Would probably have to run 2 more from the ECU.

Better question still - what happened to two of the wires that were there?

EDIT:
I doubt they would all come from the same place, on the harness, because there's a separate fuse for the O2 sensor heaters than for the O2 sensors themselves, so they're on a different circuit.

 

on the dx, and cx models they secondary o2 is through the engine harness, dont know why they didnt let both go through the floor - seems easier that way - but i guess ill hunt for the other 2 wires tomorrow....

but thanks for the help, anyone else with any experience in this jank-ness

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by scarney &raquo;</TD></TR><TR><TD CLASS="quote">on the dx, and cx models they secondary o2 is through the engine harness, dont know why they didnt let both go through the floor - seems easier that way - but i guess ill hunt for the other 2 wires tomorrow....

but thanks for the help, anyone else with any experience in this jank-ness</TD></TR></TABLE>

If I understand it correctly they should all converge at C432...and go through the floor together...

 

hmmm...well anyone else have any experince?

 

I have a 96 dx coupe and my secondary does not go through the floor. It juctions out of the engine harness at the same spot as the primary under the dizzy. Engine harness side colors are two black, whte/red and red yellow.

 

i have the same problem but with a 97 civic hx 5 speed:hammer, they left out the o2 sensor and just tie straped the harness to the primary o2 sensor harness not hooked up on either end mine is a 4 pin if someone could also help me out with the location to where i can plug this harness in so i can get the o2 sensor back into the car, thanks!!!!

 

check your dates! this thread is old!

google - majestic honda click the first link and look up your car!

 

thanks!