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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 P0451 EVAP System (CPC) Pressure Sensor/Switch Circuit Range/Performance >> Diagnostic Method
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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 - intake manifold pressure (absolute pressure) when ignition switch is ON| > 6532.8 Pa (49 mmHg, 1.9 inHg)

Time Needed for Diagnosis:  320 ms

Malfunction Indicator Light Illumination:  Illuminates as soon as a malfunction occurs.