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P1491 Diagnostic Trouble Code Discussion for June 2013

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
2002 Honda Accord EX 2.3L Poor Idle Quality VIN: 1HGCG55642
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. ... that will not hold steady idle . sometimes it idles fine. around 800 rpms. sometimes it idles around 1100 and others very low around 500 or so. the customer adjusted base idle up to correct a going dead problem. the problem he had originally was it would g...
June 12, 2013