P0131 bank 1 sensor 1

The bank one sensor one is on the right side of the engine. Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

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

Check out the images (below). Please let us know if you need anything else to get the problem fixed.