Brake pedal goes to the floor and the car will not stop

We need to start with scanning for codes and find out possible causes. Here is a guide that will help with this:

https://youtu.be/rTtAnsOlZU4

Once we know what codes are we can go from there. However, here is a guide that will help with this issue:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

Also, the most likely cause is a master cylinder issue so here is the info needed for this.

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

Once this is replaced, you will need to bleed it and the brakes. Please see this guide for help with this:

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

Lastly I attached below the info from the manual on how to replace it. Let us know what questions you have and what codes you have and we can go from there. Thanks