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Home >> Subaru >> 2019 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (STI) (1 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control >> Diagnostic Method

Diagnostic Method

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Engine coolant temperature < -15°C (5°F)
Elapsed time after starting the engine
((Smaller value either one of engine coolant temperature and intake air temperature at engine start) ≥-23.3°C (-9.9°F)) or
≥120000 ms
((Smaller value either one of engine coolant temperature and intake air temperature at engine start) < -23.3°C (-9.9°F)) ≥300000 ms

Time needed for diagnosis:  Less than 1 second

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.