I need to know where the O2 sensor plug is on the passenger side for an obdII 1996 firebird. I looked on shoebox's website but he has obdI so his is diferent. Where his passenger side o2 connection is flat, mine is square. I know I have a flat one somewhere cause my o2 has a flat conection. I have the driver side on.

 

I believe the passenger side front o2 clips below the manifold onto a little bracket bolted to the block. Look up from the starter and you should be able to see it.

 

Thank you I will look.

 

It's not there. I just put the engine back in and can't find it. It's killing me, such a simple task and I can't do it.

 

noone knows? The one by the starter(in the same cluster as the knock sensor) Is a square one.I need the front O2 plug that's flat.