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Home >> Hyundai >> 2021 >> Elantra N Line, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 35 (Engine Control System Diagnosis - 2.0L (Except HEV) (4 Of 6)) >> DTC P0456-00: Evaporative Emission System-Leak Detected (Very Small Leak) >> DTC Information And Inspection >> DTC Description

DTC Description

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

The PCM 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 PCM 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.

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