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P1491 Diagnostic Trouble Code Discussion for April 2010

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
2000 Nissan Sentra GXE 1.8L Poor Idle Quality, Hesitation, Cuts out VIN: 3N1CB51D8Y
P1491: EVAP Vacuum Cut Valve/Bypass Circuit Malfunction. Vehicle came in with complaint of intermittent no power. I was able to confirm on a test drive and in the shop. At wot I was holding at 20 mph. TPS , intake temp, coolant temp all looked normal. Maf reading looks erratic and tops out at 2.8 volts while rpm top...
April 23, 2010
2000 Nissan Sentra GXE 1.8L Poor Idle Quality, Hesitation, Cuts out VIN: 3N1CB51D8Y
P1491: EVAP Vacuum Cut Valve/Bypass Circuit Malfunction. Vehicle came in with complaint of intermittent no power. I was able to confirm on a test drive and in the shop. At wot I was holding at 20 mph. TPS , intake temp, coolant temp all looked normal. Maf reading looks erratic and tops out at 2.8 volts while rpm top...
April 23, 2010