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P1456 Diagnostic Trouble Code Discussion for May 2008

EVAP System Very Small Leak Detected

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Trouble Ticket Help Requests for DTC P1456
Help Request Posted
2002 Nissan Sentra CA 1.8L MIL Lamp on VIN: 3N1CB51D02
P1456: EVAP System Very Small Leak Detected. with the canister vent valve & vacuum cut valve grounded i ground the purge valve to put vacuum in the system. the voltage on the pressure sensor drops from 4 volts to 1.2 volts at 11 in vacuum. when i release the ground from the purge valve voltage on the...
May 19, 2008