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P0456 EVAP CONTROL SYSTEM EC-333 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O P0456 EVAP CONTROL SYSTEM On Board Diagnosis Logic INFOID:0000000009886741 This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume control solenoid valve, using the intake manifold vacuum in the same way as conventional EVAP small leak diagnosis. 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 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 come on. • If the fuel filler cap is not tightened properly, the MIL may come on. • 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. erly. • Incorrect fuel tank vacuum relief valve canister purge volume control solenoid valve. • Foreign matter caught in EVAP canister vent con- trol valve. • EVAP canister or fuel tank leaks valve and the circuit • Fuel tank temperature sensor ing or damaged • EVAP canister is saturated with water ume control solenoid valve PBIB3640E |