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P1491 Diagnostic Trouble Code Discussion for December 2009

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
2002 Nissan Pathfinder SE 3.5L MIL Lamp on, melted VIN: JN8DR09Y22
P1491: EVAP Vacuum Cut Valve/Bypass Circuit Malfunction. ... appreciated.Heres the situation customer needed to pass state inspection and had originally came in with p0455,and p1448.After hooking up evap system fogger it was bypassing vent solenoid so I quickly blocked vent solenoid to check rest of system before re...
December 04, 2009