the PCV on your 2003 Frontier S/C is on the passangers side Rocker cover(valve cover)
On or near the engine . The engine is located under the hood.
It is located inside the evaporator case.
The PCV valve, on your Nissan 3.3 liter, is located on the side of the air filter housing. The valve should be labeled for easy identification.
The EGR valve on a Nissan Frontier is on the drivers side of the engine. It is near the firewall, under the intake pipe.
how can I clean the Idle Air Control Valve on a 1998 Nissan Frontier
It's in the intake one of the bigger hoses that go in. You have to use a wrench to remove it.
The PCV valve on a 2000 Nissan Frontier 2.4 is on the top back part of the engine. It is attached to the intake manifold via a hose.
where is the pcv valve located on a 2003 Nissan sentra
where is PVC valve located on 2002 Nissan sentra
On a lot of these vehicles, the PVC valve is located on top of the valve cover, or a hose leading from the valve cover to the intake. You have to remove the right front wheel. It will be in the block. It is in an awkward place and Nissan charges about a 100.00 to install it. You can do it your self though.
The 2003 Frontier 3.3L has an expansions valve, its part of the evaporator.
The PCV valve is located on the back, drivers side of the intake manifold in a short, rubber hose. It is threaded into the intake manifold close to the last "N" in Nissan which is imprinted into the intake manifold. It requires a 3/4" wrench to remove it.