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P1491 Diagnostic Trouble Code Discussion for May 2014

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
1996 Acura TL 2.5L MIL Lamp on VIN: JH4UA2658T
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. Code p1491 egr lift problem, NOT FLOW. the egr valve is good, holds vacuum, voltage rises when i pull up on egr valve indicating lift sensor is reporting ok. Ports were clogged, i went ahead and cleaned them while I was there. I monitored egr control solenoid ...
May 17, 2014