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P0491 Diagnostic Trouble Code Discussion for June 2008

Secondary AIR System Insufficient Flow Detected (Bank 1)

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Trouble Ticket Help Requests for DTC P0491
Help Request Posted
2004 Dodge Stratus SXT 2.4L MIL Lamp on VIN: 1B3EL36J44
P0491: AIR System Performance. ... The car came to us with the air pump stuck on all the time (even with the engine off) and a P0491 (Secondary Air Injection System Insufficient Flow) code. We replaced the air pump rely and for good measure replaced the air pump check valve. The problem see...
June 06, 2008