This hose is torn and I think it is the reason for Ford Focus's Bank 1 too lean error. I think it is a PCV hose but I need to be sure.

https://www.dropbox.com/s/zc7uew03qoigtdc/2016-01-24%2013.53.26.jpg?dl=0
https://www.dropbox.com/s/im8g4nm8kp5fch5/2016-01-24%2013.54.50.jpg?dl=0
https://www.dropbox.com/s/5sffc33t90er9ku/2016-01-24%2013.55.05.jpg?dl=0

Perhaps it is a radiator hose?

I see nothing radiator looking with regard to hoses.
Perhaps it's an emission hose.. I would like some better pics first.
What is the issue? Has the light come on? DTC stored?

I see nothing radiator looking with regard to hoses.
Perhaps it's an emission hose.. I would like some better pics first.
What is the issue? Has the light come on? DTC stored?

It is a really hard area to photograph. The car stalls when at a stop. It revs up a bit, over and over, then stalls.

Remove the hose, take it into your local auto parts store, get a replacement, and reinstall.