There are (4) O2 sensors on that car, one in each exhaust manifold and one in back of each catalytic converter.
Thanks for your question and positive feedback,
I have PROOF that there are (4) O2 sensors and can show you the PICs if you would like to see them. This person is coming in on a technicality, but ALL the books call them O2 sensors. We ALL know what you meant, soory that this interruption masy be confusing to you.
Here they are;