Monitor Strategy
WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. 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 and No. 2 engine coolant temperature changes) |
| Required Sensors/Components (Main) | Thermostat Engine coolant temperature sensor |
| Required Sensors/Components (Related) | Intake air temperature sensor (for mass air flow meter sub-assembly) No. 2 engine coolant temperature sensor |
| Frequency of Operation | Once per driving cycle |
| Duration | 250 seconds: Judgment by simulated engine coolant temperature (for THS-HEV Model) 360 seconds: Judgment by simulated engine coolant temperature (for PHEV Model) -: Judgment by engine coolant temperature and No. 2 engine coolant temperature changes |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |