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Home >> Subaru >> 2017 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (P0171 To P0685) (2.5L) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0441 EVAP System (CPC) Incorrect Purge Flow >> Execution Condition

Execution Condition

Secondary parameters Execution condition
(Evaporative Leak Check Module switching valve for time) = Close < 120000 ms
Purge control duty ratio > 0%
Precondition (Conditions to close the switching valve of Evaporative Leak Check Module intrusively):  
Battery voltage ≥ 10.9 V
Barometric pressure ≥ 75.1 kPa (563 mmHg, 22.2 inHg)
Integrated value of calculated purge airflow since engine start ≥ 72 g(2.54 oz) (1)
Barometric pressure - Manifold absolute pressure ≥ 17.3 kPa (130 mmHg, 5.1 inHg)
((Accelerator pedal position for time) followed by = 0% ≥ 1000 ms
Accelerator pedal position) 0%
Ambient air temperature ≥ -25 °C (-13 °F)
(1) It takes approximately 2 min at 40 mph.