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P1491 Diagnostic Trouble Code Discussion for August 2006

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
2000 Acura RL Premium 3.5L MIL Lamp on VIN: JH4KA9664Y
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. I have this Acura setting only the 1491 lift sensor code. I have noted the posting for EGR on the sight but they all relate to a P0401. The cleaning at the EGR valve port went well with lots of flow and vac. durring the test. The lift sensor works normal but i...
August 09, 2006