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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Engine Controls (Diagnostics) (H4DOTC)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0411 Secondary Air Injection System Incorrect Flow Detected >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK SECONDARY AIR COMBINATION VALVE. 
Check the pipe between the secondary air combination valve and cylinder head.		 Is there damage or disconnection of the pipe? Replace the pipe between secondary air combination valve and cylinder head. Go to step 2. 
2 CHECK SECONDARY AIR COMBINATION VALVE. 
Race the engine at 2, 000 rpm to check whether or not the exhaust leak is heard.		 Is there any exhaust leak? Replace the pipe between secondary air combination valve and cylinder head. Repair the poor contact of ECM connector.
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