Where is the O2 sensor bank 2 sensor 1 located and to replace it instructions?

Hello,

The bank 2 sensor 1 is the Oxygen sensor that is located on the exhaust manifold, facing the front of the vehicle.

In order to replace the oxygen sensor, you will need an oxygen sensor socket and a standard ratchet.
Many times, the sensor will get seized on the manifold and you will have to use penetrating oil to loosen up the sensor.
Here is a helpful guide that goes over the best practices:

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

I have attached diagrams below for your reference.

Please let me know if you have any questions.
Thank you.