DTC Description
WARNING: This page is about a different car, the 2021 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
The PCM closes the CCV at the charcoal canister to seal off the evaporative emission system and then opens PCSV to generate a vacuum in the fuel tank. This vacuum generation phase will determine if there is a large leak like tank cap open or canister shut off valve stuck open. The PCM sets DTC P045500 if the pressure in the fuel tank does not drop as low as predetermined threshold during predetermined maximum vacuum generation period.