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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 P04F0: EVAP System High Pressure Purge Line (CPC2) Performance >> Diagnostic Method
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Diagnostic Method

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
<Phase 1>
Evaporative Leak Check Module pressure (gauge) >-266.6Pa(2 mmH g, 0.1 inHg)
<Phase 2>
Evaporative Leak Check Module pressure (gauge) < 266.6Pa(2 mmHg, 0.1 inHg)

Phase1 

Time needed for diagnosis:  Less than 1 second

Phase2 

Time needed for diagnosis:  Less than 1 second

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.