Typical Malfunction Thresholds
WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
ECT sensor cold start monitor:
TYPICAL MALFUNCTION THRESHOLDS
| ECT sensor value change |
Less than 5°C (9°F) |
ECT sensor soak monitor:
TYPICAL MALFUNCTION THRESHOLDS
| ECT sensor value change |
Less than 5°C (9°F) |