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Where is the PVC valve located on a 2002 Nissan Frontier 4-cylinder 2WD?

The PCV (Positive Crankcase Ventilation) valve on a 2002 Nissan Frontier 4-cylinder 2WD is typically located on the valve cover. It's often a small, plastic valve with a hose attached to it. However, the exact location on the valve cover can vary slightly. You'll likely need to consult a repair manual specific to your vehicle's year and engine (the exact engine code would help pinpoint it even further) or use a visual guide found online by searching for "2002 Nissan Frontier 4-cylinder PCV valve location." Look closely at the valve cover for a small, usually black, plastic component with a hose connection.