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Home >> Subaru >> 2015 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) (STI) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P2431 Secondary Air Injection System Air FLO/RESSURE Sensor 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 

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.