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P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2.

Change upper bank 2........
Since that's the code you have.

That's the tough one, but if you put your car on jack stands it's easy.
Crawl under and you can reach up to the top of the bank.
I've done it using jack stands and on a hoist, going from the engine bay is brutal.

Don't just jack the car up, it's not safe, as you'll be using force to loosen the O2.