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P1491 Diagnostic Trouble Code Discussion for September 2005

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
2001 Honda Accord LX 3.0L Excessive Emissions, MIL Lamp on VIN: 1HGCG16461
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. ... and cleaned all the passages in the intake but did not do the update as per service bulletin--don't ask why cause I don't know ?? All was well for a couple of weeks but now has come back with just the p1491 code and it sets immediately. when we manually en...
September 06, 2005
2001 Honda Accord LX 3.0L Excessive Emissions, MIL Lamp on VIN: 1HGCG16461
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. ... and cleaned all the passages in the intake but did not do the update as per service bulletin--don't ask why cause I don't know ?? All was well for a couple of weeks but now has come back with just the p1491 code and it sets immediately. when we manually en...
September 06, 2005