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Home >> Subaru >> 2021 >> Crosstrek Sport >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Engine Control System (HEV) (Diagnostics) (1 Of 4)) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0128: Coolant Thermostat (Engine Coolant Temperature Below Thermostat Regulating Temperature) >> General Description >> Execution Condition

Execution Condition

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Secondary parameters Execution condition
< Judgment 1>
Battery voltage 10.9 V or more
Ambient air temperature -7°C (19.4°F) or more
Vehicle speed 30km/h (18.6MPH) or more
Engine coolant temperature at engine start Less than 60°C (140°F)
< Judgment 2>
Battery voltage 10.9 V or more
Ambient air temperature -7°C (19.4°F) or more
Vehicle speed 30km/h (18.6MPH) or more
Engine coolant temperature at engine start Less than 60°C (140°F)
< Judgment 3>
Battery voltage 10.9 V or more
Ambient air temperature -7°C (19.4°F) or more
Actual engine coolant temperature Value of Map1 or more (experienced)
Diagnosis mask condition Not established