Where is the PCV valve on 2000 2003 Mercury Sable Duratec engine?

The PCV valve on a 2000-2003 Mercury Sable with the Duratec engine is located on the valve cover. It's typically a small, usually black, plastic valve with a hose connected to it. It's not always in the same exact spot on all valve covers, but it will be *on top of the valve cover* somewhere near the center or slightly towards the rear (firewall side) of the engine.

Because there's some variation in valve cover design, you might need to consult a repair manual specific to your vehicle's year and engine (the exact Duratec variant matters) for a precise location diagram. A quick online search for "[your year] Mercury Sable Duratec PCV valve location" with images will also likely show you pictures of where it's located on similar engines.