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EC-756 < COMPONENT DIAGNOSIS > [VK56DE] P0456 EVAP CONTROL SYSTEM P0456 EVAP CONTROL SYSTEM On Board Diagnosis Logic INFOID:0000000005257721 This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume control solenoid valve, using the negative pressure. If ECM judges a leak which corresponds to a very small leak, the very small leak P0456 will be detected. If ECM judges a leak equivalent to a small leak, EVAP small leak P0442 will be detected. If ECM judges that there are no leaks, the diagnosis will be OK. CAUTION: • Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may illuminate. • If the fuel filler cap is not tightened properly, the MIL may illuminate. • Use only a genuine NISSAN rubber tube as a replacement. 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 properly. • Incorrect fuel tank vacuum relief valve ister purge volume control solenoid valve • Foreign matter caught in EVAP canister vent control valve • EVAP canister or fuel tank leaks and the circuit • Fuel tank temperature sensor damaged • EVAP canister is saturated with water control solenoid valve PBIB3640E 2010 Pathfinder |