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Home >> Subaru >> 2007 >> Outback XT Limited, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P2431 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance >> Diagnostic Method
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Diagnostic Method

Abnormality Judgment 

Judge as NG if the continuous time of meeting the following conditions is 0.3 seconds or more.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
|Secondary air pipe pressure - Intake manifold pressure| > 200 mmHg
|Intake manifold pressure at engine start - Intake manifold pressure| < 10 mmHg

Time Needed for Diagnosis:  0.3 seconds

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

Normality Judgment 

Judge as OK and clear the NG when the continuous time of meeting the following conditions is 0.26 seconds or more.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
|Secondary air pipe pressure - Intake manifold pressure| < 200 mmHg