Hey Gang,

I have a 2004 GX with an error code that indicates a bad 02 sensor, bank 2 sensor 2. I know it passenger side post Cat but I can’t seem to find it. Can anyone help point me in the right direction?

 

Behind the wheel well duct cover

 

Do you know if both sensor 1 and sensor 2 are located there? I only saw the pre cat sensor which I assume is sensor 1.

 

Sensor 2 on that side will be after the catalytic converter.

Sensor 1 tells the computer if the engine is running rich or lean, and sensor 2 tells the computer how effective the catalyst is at cleaning it up.

Chip H.

 

So sensor 2 isn’t in the wheel well? It’s further down the line right? Do I access it from under the truck?

 

See picture

 

Very helpful. Thanks you!!