Can someone tell me how many o2 sensors the Acura Integra GSR have?
Some sites say 1, others say 2, and some cars I guess in California have 3. (smog and emissions) Today my CEL came on and it is a code 43, which is the fuel system. My car is running rich so I am assuming it is the o2 sensor.

 

OBD 1 has 1 o2 and obd2 has 2 sensors to check the cat efficency.
That why you hear different stories.

 

Thanks for the reply, another question do you know the location, while shopping around on the net, some sites say its pre-cat, while others say it is in the front (im guessing the headers) im not sure, because technically the headers is before the catalytic converter is this what they mean about "pre-cat"? Thanks for any replies.

 

pre-cat would be the primary 02 sensor. Post-cat would be your secondary 02 sensor. Front = primary. All your secondary 02 does is make sure your cat is as efficient as it should be

 

Thank you very much for your reply.

 

no problem