Purge Control Solenoid Valve (PCSV): Notes

Purge Control Valve (PCV) controls evaporative gas gathered in canister. It is divided into duty type controlled by ECU and ON/OFF type controlled by vacuum in intake manifold and ECU.

PCV is closed when water temperature is low or engine is idle and is open when water temperature is in normal temperature. When it is open, evaporative gas in canister is flowed into the intake manifold.

Especially duty type PCV is called Purge Control Solenoid Valve (PCSV). Duty is 0% when it is wholly closed, and 100% when it is wholly open (Generally Idle: 1~3 %, Max: 92%).