Monitor 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.
The ECM monitors the continuously variable valve lift controller assembly and detects malfunctions. If the actual duration differs from the requested duration by 14.5°CA or higher, the ECM illuminates the MIL and stores a DTC. DTC P10A0 is usually only stored if a malfunction is detected during cold engine start. DTC P1055 is stored if a malfunction is detected in any other situation.