Typical Malfunction Thresholds
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.
COLD START MONITOR
| Engine coolant temperature sensor value change | Less than 5°C (9°F) |
SOAK MONITOR
| Difference between current engine coolant temperature sensor value and previous engine coolant temperature sensor value when engine stopped | Less than 5°C (9°F) (varies with engine coolant temperature of last trip engine stop) |