P0037 on My '06 Highlander

I have my 2006 Highlander with a v6, and the other day it gave me a P0037 code which is for an O2 sensor in bank 1 sensor 2. I went on Rock Auto, but there seems to be a differenet sensor for different positions, so my question is where is Bank 1 and where is the second sensor on bank 2?

Bank 1 sensor 2 is the O2 sensor after the catalytic converter.


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Bank 1 is the rear bank, firewall side of the engine.

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