I just bought a air/fuel gauge for the civic and I came across a problem, I have no o2sensor? I would think that i would have one because not having one would throw a code, wouldn't it? Well, if I do have one, could it have been relocated from the previous owner? Is there another way to hook the gauge up? I even tried wiring it strait to the ecu, but I still got nothing. Please help!!

 

What car? year?

 

Its a 94 civic ex

 

your o2 sensor is connected to the header

 

Yeah That is where it would be on a stock exhaust manifold But I have an aftermarket (number 1) header and there seems to be no o2 sensor or a connection for that matter.