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Ford Truck
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2007
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F 150 2WD V8-4.6L VIN W
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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Diagnostic Trouble Code Descriptions
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P Codes
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P0491
P0491
P0491 - Secondary Air Injection (AIR) System Insufficient Flow (Bank 1):
