Where is Pvc valve on Nissan Sentra 2005?

Hello,

On a 2005 Nissan Sentra, the PCV valve is part of the crankshaft ventilation system. It's where the smaller tubing off the inlet air duct (top right) enters the valve cover. For an illustration of its precise location, it is Part Code 11810 in the diagram listed under the "Related Links and Sources" portion of this answer.

Hope this helps!