WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
Both of the following conditions are met
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Average engine load value ratio
Less than 0.85, or higher than 1.18 (varies with estimated engine load)