I need to change the bank 1 sensor 1 oxygen sensor can you help me?

It does sound like we need to replace the sensor so here are some guides that will help with all this:

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

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

Plus here is a guide on how to replace it on a similar vehicle:

https://youtu.be/B4CAou7i7Io

Below you will find the process from the manual that will help with replacing this as well.

Please run through this material and let us know if you have any questions. Thanks