WARNING: This page is about a different car, the 2018 Toyota Sequoia, 2017 Toyota Sequoia, and 2016 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
Both of following conditions 1 and 2 met
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1. Averaged engine load value ratio
Less than 0.85, or more than 1.15 (varies with estimated engine load)