Hyundai Sonata LF: Engine Control System / Canister Close Valve (CCV) Description and Operation
Canister Close Valve (CCV) is installed on the canister
ventilation line. It seals evaporative emission control system by
shutting the canister from the atmosphere when leakage detecting system
operates.

Inspection
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the fuel pressure regulator valve connector...
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