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Home >> Subaru >> 2021 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2.5L) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0441: EVAP System (CPC) Incorrect Purge Flow >> Execution Condition
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Execution Condition

Secondary parameters Execution condition
Battery voltage ≥10.9V
Barometric pressure ≥ 75.06 kPa (563 mmHg, 22.2 inHg)
Integrated purge gas amount since engine starting ≥ 10 g (0.35 oz)(1)
(Duration time of the purge control duty ratio = 0% ≥1500 ms
Purge control duty ratio from above) 0%
Ambient air temperature > -25°C (-13°F)
Time when the second purge valve control is OFF ≥1500 ms
Time when the evaporative system leak check module switching valve is closed < 25000 ms
(1) It is approximately 2 sec per the integration of purge to reach 1g at vehicle speed of 40 MPH.