***Wanna wire in a second o2 sensor****Help

[H1Cblacknight]

So heres the problem I'm having....

I have a 97 civic dx coupe. It has a d15b vtec motor meaning it has one o2 sensor plug in the engine harness. I want to know how I can run a second o2 sensor since i need (2) for an obd2 ecu.

I know on most ex civics, the second o2 sensor come out through the bottom of the floor pan and screws in right after the cat.

So what do I do? How do I do it?

Im running a p28 right now with a jumper so i dont have a check engine light and it runs rich. But i wanna run my obd 2 ecu

[HillClimbGuy]

if it is an early obd2 car it should be a non heated narrow band (1 wire) if so they are easy to wire in first you need a pin diagram to find the input wire to the ecu for the down stream o2 sensor then what you would need is a connector female an male end to make is easier to plug in and swap out in the future the hasrdest part with this project is wielding in a new o2 sensor bung into your exhuast.