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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0128 Coolant Thermostat (Engine Coolant Temperature Below Thermostat Regulating Temperature) >> Enable Condition

Enable Condition

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ENABLE CONDITION

Secondary Parameters Enable Conditions
< Judgment 1 >
Battery voltage ≥ 10.9 V
Estimate ambient temperature ≥ -7 °C (19.4 °F)
Vehicle speed ≥ 30 km/h (18.6 MPH)
Estimated coolant temperature ≥ Value of Map 1
< Judgment 2 >
Battery voltage ≥ 10.9 V
Estimate ambient temperature ≥ -7 °C (19.4 °F)
Vehicle speed ≥ 30 km/h (18.6 MPH)
Estimated coolant temperature ≥ Value from Map 2
< Judgment 3 >
Battery voltage ≥ 10.9 V
Estimate ambient temperature ≥ -7 °C (19.4 °F)
Vehicle speed ≥ 30 km/h (18.6 MPH)
Estimated coolant temperature ≥ Value from Map 3
MAP 1

Engine coolant temperature at engine starting °C (°F) -7 (19.4) 8 (46.4) 10 (50) 25 (77)
Estimated coolant temperature °C (°F) 70 (158) 70 (158) 70 (158) 70 (158)
MAP 2

Engine coolant temperature at engine starting °C (°F) -7 (19.4) 8 (46.4) 10 (50) 25 (77)
Estimated coolant temperature °C (°F) 76.5 (169.7) 76.5 (169.7) 76.5 (169.7) 76.5 (169.7)
MAP 3

Engine coolant temperature at engine starting °C (°F) -7 (19.4) 10 (50) 25 (77) 39 (102.2)
Estimated coolant temperature °C (°F) 57.9 (136.2) 64.8 (148.6) 70.8 (159.4) 76.5 (169.7)