DTC P2420: Evaporative Emission Pressure Switching Valve Stuck OFF [01/2019 - 03/2019]: Description

WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, 2020 Toyota Corolla, and 2019 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.