QFT! I had learned some wires in a car were suppose to be twisted, guess the o2 sensors wires are not one of them.

 

Correct the O2 sensors & A/F sensors like their wires to remain straight and free of any resistance.

Joe Z

 

Is the part number from Deno 234-4521 for bank 1/2 sensor 2 (downstream)?

http://www.rockauto.com/m/mobilecata...=Ad+Code+G-UK#

http://www.rockauto.com/catalog/more...nid=299&jpid=1

Also does anyone know if sensor 2 harness clips only accessible from removing the interior carpet and seats?

 

You can do it by moving the seat far back and try to peel the carpet back & up enough to get your arm under there.. The clip sorta sits next to your calve, attached to the tunnel wall.

The below info should help you

Joe Z

 

Thanks Joe! I assume only the O2 sensors (downstream, mid pipe) are the ones with the clips hidden behind the carpeting?

I am wondering if I need to replace the AF sensors as well while I'm there, but I'm pretty sure the wiring for that is not hiden behind interior trim?

 

Correct..

The A/F sensor clip is located by each manifold behind the last exhaust port hole against the firewall.

You really only change the A/F senor if its bad or if the threads seize while attempting removal.

~ Joe Z

 

Really appreciate the help Joe, this forum is awesome.

 

I had the same issue after I installed my borla cat back, but after replacing the sensor, found out that I had an exhaust leak....make sure you check for leaks before you start to dump $ on sensors!

Bank 2 sensor 2 was the code I was getting

 

^^ Correct...

Always check for gasket leaks and twisted sensor wires before straight up replacing sensors..!!

Joe Z

 

Good call! Check the easy stuff before the expensive stuff