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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0128 Coolant Thermostat (Engine Coolant Temperature Below Thermostat Regulating Temperature) >> Enable Conditions

Enable Conditions

ENABLE CONDITIONS

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) 73.2 (163.8) 80 (176) 80 (176) 80 (176)
MAP 3

Engine coolant temperature at engine starting °C (°F) -7 (19.4) 10 (50) 25 (77) 48.9 (120)
Estimated coolant temperature °C (°F) 56.5 (133.7) 63.6 (146.5) 69.9 (157.8) 80 (176)