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.
If there is Short to ground in PCSV circuit, ECM sets DTC P0458.
Item
Detecting Condition
Possible Cause
DTC Strategy
Circuit continuity check, low
Poor connection
Short to ground in control circuit
PCSV
Enable Conditions
-
Threshold Value
Short circuit to ground
Diagnostic Time
Continuous
MIL ON Condition
3 driving cycle
Specification
PCSV Coil Resistance (O)
16.0 [20 ? 68 ?]