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P0491 Diagnostic Trouble Code Discussion for September 2008

Secondary AIR System Insufficient Flow Detected (Bank 1)

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Trouble Ticket Help Requests for DTC P0491
Help Request Posted
2002 Volkswagen Passat GLX 2.8L MIL Lamp on VIN: WVWRH63B62
P0491: secondary air injection system insufficient bank1. have checked all lines to and from the air pump to various engine components also have checked for broken vaccum lines at the control valve no problems seen thus far any help will be greatly appreciated also most of the test for these codes says to use vag sca...
September 05, 2008