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P0491 Diagnostic Trouble Code Discussion for March 2015

Secondary AIR System Insufficient Flow Detected (Bank 1)


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Trouble Ticket Help Requests for DTC P0491
Help Request Posted
2007 BMW 328i 3.0L MIL Lamp on VIN: WBAVC53507
P0491: Secondary Air Injection System Insufficient Flow Bank 1. Hello BMW Techs, We have tried multiple things to make this code go away. We checked the hose going to Air Injection valve and it's fine. We tried a different Air Injection pump (used one)with no luck. We installed a new Air Injection Valve and we still have t...
March 24, 2015
2009 Audi Q5 Premium 3.2L MIL Lamp on VIN: WA1KK78R59
P0491: Secondary Air Injection System Insufficient Flow Bank 1. ... with the Intake code P2070 Intake Manifold Tuning valve stuck open. We would like to know if these manifolds have internal issues and if anyone has seen anything external cause this code. The second code on the list we are familiar with P0491 Air Injection...
March 26, 2015