Hello, I got a 1994 Honda Civic CX hatchback and the guy I bought it from never ran an o2 sensor and it ran like **** so I replaced the entire exhaust from the manifold back and I can’t find where the o2 sensor plugs into like no harness at all and I’m wondering if there is any way to wire one in or if there is a way around that. Car is completely stock just need help figuring it out thank you

 

I'm not sure if this will help exactly, but take a look at the diagram of where the plug should appear, it's a little hidden. There are a lot of pics on this thread, but you should see one that shows the o2 sensor and where the other side is.

https://honda-tech.com/forums/honda-...guide-3146770/