Park sense not seeing empty spaces

[knelso4]

In an empty parking lot with perpendicular striping, I press the parksense button, hit OK for perpendicular, and the display says searching (or whatever). I drive past multiple spaces but nothing is found. Is this supposed to work only when there is a vehicle beside an empty space?

 

[Ramlax]

So I had this happen also and kind of annoying, but yes it only works when there are other cars around

 

[ericd]

Yea. The sensors are looking for physical cars, not lines like the lane departure

 

[djwdjw]

It figures if there are no around you can park without assistance. I tested both modes the other day and it does a fine job as long as there are cars to sense and only one truck-sized space is open.