General Information

Engine Control
P0444 Evaporative Emission System-Purge Control Valve Circuit Open - General Information

Component Location





General Description

The purge solenoid is a pneumatic device that meters the air and fuel (purge) vapor flow to thepurge port. In a sense, the purge solenoid is comparable to a fuel injector, because the meteredpurge flow follows the same slope and offset characteristics. However, the purge solenoidnormally runs with a duty cycle at a fixed frequency because the opening response is significantly slower than a fuel injector. It would not practical to run the solenoid synchronously with engine events except perhaps at very low RPM. The normal frequencies for the purge solenoid are between 8 and 20 Hz.

DTC Description

If there is Open in PCSV circuit, ECM sets DTC P0444.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram