Does anyone know what wire is the 0-1V output for our rear or front O2 sensor??

I have no emmisions in my province so should i get rid of my cat?? I have a way to disable all the engine light codes that would appear with no cat. The second O2 sensor is just there for emmisions purposes right? to see if the cat is working??

 

you can undo that sensor with hp tuners

 

the fron O2 sensor's signal wire is the purple one and the rear on is purple and white.

 

The rear o2 sensor is stricktly emissions. In fact when I got my new exhaust, I didn't include a rear o2 sensor.