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Home >> Subaru >> 2016 >> WRX STI Limited >> Repair and Diagnosis >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P2431 Secondary Air System Air Flow/Pressure Sensor Circuit Range/Performance Bank 1 >> 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
|Secondary air pipe pressure - Intake manifold pressure| > 7.9 kPa (59.44 mmHg, 2.3 inHg)

Time Needed for Diagnosis:  320 ms

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