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Home >> Subaru >> 2021 >> Crosstrek Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Control System (2.0L (Except For 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
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
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 Map 1 or more experienced
Diagnosis mask condition Not established
TEMPERATURE SPECIFICATIONS - MAP 1

Ambient temperature (°C (°F)) -7 (19.4) 8 (46.4) 10 (50) 25 (77)
Actual engine coolant temperature (°C (°F)) 69.8 (157.6) 78.4 (173.1) 78.4 (173.1) 78.4 (173.1)