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P0491 Diagnostic Trouble Code Discussion for September 2012

Secondary AIR System Insufficient Flow Detected (Bank 1)

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Trouble Ticket Help Requests for DTC P0491
Help Request Posted
2006 Ford Fusion SEL 2.3L Hesitation, MIL Lamp on VIN: 3FAHP08Z16
P0491: Secondary AIR System Insufficient Flow Detected (Bank 1). Hi Group, Have this Fusion that has 3 codes for the secondary air injection system,have looked in archives, but found nothing,dealer does not know what I am talking about with the sec. air inj. system. Could this be the air pump under the engine? Or maybe a re...
September 13, 2012