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Home >> Genesis >> 2021 >> G90 5.0 Ultimate, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System Diagnosis - 3.3L (6 Of 9)) >> DTC P0456-00: Evaporative Emission System-Leak Detected (Very Small Leak) >> DTC Information >> DTC Description

DTC Description

WARNING: This page is about a different variant/trim than selected.

The ECM closes the Canister Close Valve (CCV) at the charcoal canister to seal off the evaporative emission system and then opens purge control valve (PCSV) to generate a vacuum in the fuel tank. After vacuum generation, the ECM measures pressure differential curve in the fuel tank and sets DTC P044200 or P045600 if the vacuum generated within a monitoring period increases above a defined threshold.

If same error code is set in the next driving cycle, the ECM illuminates the MIL.

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