Monitor Description
WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
When the EFI main relay is operated by the ECM after the ignition switch is turned off, if the electronic throttle motor circuit is detected as not being shut off correctly, the ECM will illuminate the MIL and store this DTC.