Where is the PCV valve on a 2005 Ford Expedition?

On a 2005 Ford Expedition, the PCV (Positive Crankcase Ventilation) valve is located on the rear valve cover of the engine. You'll need to remove the engine cover to access it more easily. The valve is typically connected to a hose, and you can identify it by its round shape. Make sure to consult your vehicle’s manual for specific details and diagrams for reference.