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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostics) (P0171 To P0685) (H4DOTC) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0451 EVAP System (CPC) Pressure Sensor/Switch Circuit Range/Performance >> Diagnostic Method

Diagnostic Method

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
|Evaporative Leak Check Module pressure sensor output value when ignition switch is ON - intake manifold pressure (absolute pressure) when ignition switch is ON| > 12.4 kPa (93 mmHg, 3.7 inHg)

Time needed for diagnosis:  0.32 s

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.

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