there is 2 sensors,
primary (pre cat) is deling with Air -fuel ratio closed loop running
secondary (post cat) basically checks to see if the cat is working .
the primary sensor is a wideband and different to the one from a type r civic (what many motor factors list as the correct part)
a few years ago the aftermarket/non genuine ones never seemed to work very well, buy more recently they seem to be ok.
you need a primary sensor i expect