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Home >> Subaru >> 2021 >> Crosstrek Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Control System (2.5L) (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 AND EXECUTION CONDITION - DIAGNOSIS 1

Secondary parameters Execution condition
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 61°C (141.8°F)
SECONDARY PARAMETERS AND EXECUTION CONDITION - DIAGNOSIS 2

Secondary parameters Execution condition
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 61°C (141.8°F)
SECONDARY PARAMETERS AND EXECUTION CONDITION - DIAGNOSIS 3

Secondary parameters Execution condition
Battery voltage 10.9 V or more
Ambient air temperature -7°C (19.4°F) or more
Actual engine coolant temperature Value of Map1 experienced
Diagnosis mask condition Not established
TEMPERATURE SPECIFICATIONS - 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)) 72 (161.6) 78.9 (174) 78.9 (174) 78.9 (174)