Monitor Strategy
WARNING: This page is about a different car, the 2024 Lexus ES 250, 2023 Lexus ES 250, 2022 Lexus ES 250, and 2021 Lexus ES 250. However, it is still accessible from the selected car via links, so may be relevant.
| Related DTCs | P0128: Coolant thermostat (judgment by simulated engine coolant temperature) P0128: Coolant thermostat (judgment by engine coolant temperature change at high vehicle speed) |
| Required Sensors/Components (Main) | Thermostat Engine coolant temperature sensor |
| Required Sensors/Components (Related) | Intake air temperature sensor (for mass air flow meter sub-assembly) Vehicle speed sensor |
| Frequency of Operation | Once per driving cycle: Judgment by simulated engine coolant temperature Continuous: Judgment by engine coolant temperature change at high vehicle speed |
| Duration | 300 seconds: Judgment by simulated engine coolant temperature -: Judgment by engine coolant temperature change at high vehicle speed |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |