Hey all, New guy here and hopefully someone can pass some knowledge over to me about this

I have 02 camry se v6 and the check engine light came on recently. I had the code read at a autozone around me and he gave me a print out that said it was code p1155. I've searched around and it seems like its bank 2 sensor 1.
The thing is I have read that its also bank 1 sensor 1 bank 1 sensor 2 etc etc. Being the broke *** college student that I am, I really don't want to order the wrong part! So hopefully someone here can re assure me of which sensor it is and where its located? Also is denso part 234-9021 the correct one? Sorry for the wall of text and Thanks in advanced!
