Typical Malfunction Thresholds
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P0128-00: JUDGMENT BY SIMULATED ENGINE COOLANT TEMPERATURE
| Duration that both of the following conditions are met | 5 seconds or more |
| (a) Estimated engine coolant temperature | 75°C (167°F) or higher |
| (b) Engine coolant temperature sensor output | Less than 75°C (167°F) |
P0128-07: JUDGMENT BY ENGINE COOLANT TEMPERATURE CHANGE AT HIGH VEHICLE SPEED
| Malfunction counter | 3 times or more |
| Malfunction counter is incremented when following conditions are met | A and B |
| A. Average engine coolant temperature change (vary with current engine coolant temperature, estimated ambient air temperature, intake air mass and vehicle speed) | Less than -0.018°C/sec (-0.032°F/sec) |
| B. Engine coolant temperature is satisfied throughout this period | Less than 75°C (167°F) |