: The vehicle's computer (PCM/ECU) commands the valve to close to seal the EVAP system for pressure leak tests.
For many Elantra model years (including 2001–2016), replacing the CCV is a manageable DIY task. canister-close-valve-hyundai-elantra
: Find the black plastic charcoal canister held by a metal strap (usually secured by 12mm nuts). : The vehicle's computer (PCM/ECU) commands the valve