System Components
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The CCV oil separator varies the amount of blow-by gases returned to the intake manifold based on available engine vacuum. It also prevents excessive vacuum from the intake system from reaching the crankcase.
The CCV tube carries the blow-by gases from the crankcase to the lower intake manifold.