WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
Monitor runs whenever the following DTCs are not stored
None
Both of the following conditions are met
-
Engine
Running
Estimated heated oxygen sensor temperature
450°C (842°F) or higher, and less than 750°C (1382°F)