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DTC P1456 EVAP CONTROL SYSTEM EC-565 C D E F G H I J K L M A EC DTC P1456 EVAP CONTROL SYSTEM PFP:14710 On Board Diagnosis Logic ABS002VN This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume CAUTION: ● Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0456 Evaporative emission ● EVAP system has a very small leak. ● EVAP system does not operate prop- ● Incorrect fuel tank vacuum relief valve ● Incorrect fuel filler cap used ● Fuel filler cap remains open or fails to close. ● Foreign matter caught in fuel filler cap. ● Leak is in line between intake manifold and EVAP ● Foreign matter caught in EVAP canister vent con- ● EVAP canister or fuel tank leaks ● EVAP purge line (pipe and rubber tube) leaks ● EVAP purge line rubber tube bent ● Blocked or bent rubber tube to EVAP control sys- ● Loose or disconnected rubber tube ● EVAP canister vent control valve and the circuit ● EVAP canister purge volume control solenoid ● Absolute pressure sensor ● Fuel tank temperature sensor ● O-ring of EVAP canister vent control valve is miss- ● Water separator ● EVAP canister is saturated with water ● EVAP control system pressure sensor ● Refueling control valve ● ORVR system leaks ● Fuel level sensor and the circuit ● Foreign matter caught in EVAP canister purge vol- SEF323U |