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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Diagnostic Trouble Code (DTC) Detecting Criteria (H6DO)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance >> Diagnostic Method

Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

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

Malfunction Criteria Threshold Value
|ELCM pressure sensor output value - intake manifold pressure (absolute pressure) when ignition switch is ON| > 4.226 kPa (31.7 mmHg, 1.25 inHg)

Time Needed for Diagnosis:  328 ms

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.

Time Needed for Diagnosis:  262 ms

JUDGMENT VALUE

Malfunction Criteria Threshold Value
|ELCM pressure sensor output value - intake manifold pressure (absolute pressure) when ignition switch is ON| ≤ 4.226 kPa (31.7 mmHg, 1.25 inHg)

Time Needed for Diagnosis:  262 ms