Positive Crankcase Ventilation (PCV) System: Overview
The PCV system cycles crankcase gases back through the induction system into the engine where they are burned. The PCV system regulates the amount of ventilated air and blow-by gases to the intake manifold.
The PCV systems that comply with on board diagnostics (OBD) PCV monitoring requirements use a quarter-turn camlock thread design at one end to prevent accidental disconnection from the valve cover. For more information about the PCV monitor, refer to POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM MONITOR .