Outline Of Diagnosis
WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For the detection standard, refer to DTC P0413. < Ref. to
DTC P0413 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE "A" CIRCUIT OPEN , Diagnostic Trouble Code (DTC) Detecting Criteria. >