Where is the 02 sensor located and how do i disconnect it?

A picture would be really helpful too.

Thanks

 

It on the forward end of the cat , behind the left rear wheel .
The wire points straight up from the sensor , then it runs up into the engine compartment .
To disconnect it look into the engine compartment on the left side under the coils .
Find the wire coming up from the O2 sensor and disconnect it .

 

Thanks