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Home >> Subaru >> 2018 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) (STI) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P04F0: EVAP System High Pressure Purge Line (CPC2) Performance >> Execution Condition
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Execution Condition

Secondary parameters Execution condition
Common condition (Phase 1, Phase 2)
Battery voltage ≥ 10.9 V
Barometric pressure ≥ 75.1kPa (563mmHg, 22.2inHg)
Fuel level ≥ 9L
<Phase1>
Integrated purge air amount since engine starting ≥ 72 g (2.54 oz)*
Purge control duty ratio = 0% duration time ≥ 1000ms
Ambient air temperature > 4.4°C (39.9°F)
and
< 35°C (95°F)
Intake air amount per 1 second > Map
Commanded solenoid valve for secondary purge Open

* It is approximately 2 sec per the integration of purge to reach 1g at vehicle speed of 40 MPH.

FUEL LEVEL SPECIFICATION - MAP

Fuel level
(L (US gal))
0
(0)
10
(2.64)
20
(5.28)
30
(7.93)
40
(10.57)
50
(13.21)
60
(15.85)
Intake air amount per 1 second
(g/s)
80 80 60 60 60 60 60