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P1491 Diagnostic Trouble Code Discussion for January 2004

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
1999 Honda Accord EX 3.0L MIL Lamp on VIN: 1HGCG1656X
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. This car has had a new EGR valve after passages were verified clear.The flow chart test only "proves" the problem is intermittent.Great , but now what do I do.The customer is being patient, but for how long?I don`t want to just throw parts at it (compu...
January 14, 2004