i got a d16y7 engine in my "96 civic dx i got my primary O2 sensor in but i dont have the secondary O2 sensor on. i can't find the wiring harness for it!! i have the secondary O2 sensor but nowhere to plug it in to after i put it in the cat!!! PLEASE HELP!!!!

 

bump for the same problem after i swapped in my ITR.
j/k my gsr but still bump

 

On my 97 Civic DX (should be the same as a 96), the primary and secondary O2 sensors plugs are located next to each other in the front of the engine (close to the header, just below the top rad. hose). You might need to extend it to where ever the sec. O2 is if you made any modification to your exhaust system.