Yeah I was wondering is there a o2 on a cat in 95s? I don't remember and I'm too lazy to look. And would test pipe throw a o2 code or any other codes on 95.

Oh and if there is a o2 on a test pipe is it a pain in the *** to get out, because I replaced a o2 on my friends altima and I had to rethead the freaken hole which sucked major *****.

 

Yes, there is. It has a smaller thread diameter than the front O2 sensors. Putting in a test pipe will usually throw a code. The ecu looks for a difference in sensor signals between the front and rear sensors, and without the cat there is no difference, hence the 0707 code.

Interestingly, when I had JWT program my ecu for larger injectors they also programmed it not to throw the 0707 code.