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Home >> Subaru >> 2019 >> Ascent Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0116: Engine Coolant Temperature Sensor 1 Circuit Range/Performance >> Diagnostic Method

Diagnostic Method

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
|Engine coolant temperature at engine start - Intake air temperature 21 sec. after engine start| More than value of Map
|Engine coolant temperature at engine start - Ambient air temperature at engine start| More than 25°C (45°F)

Map 

TEMPERATURE SPECIFICATION

Ambient temperature (°C (°F)) -30 (-22) 30 (86) 45 (113) 60 (140)
|Engine coolant temperature at engine start - Intake air temperature 21 sec. after engine start| (°C (°F)) 12 (21.6) 12 (21.6) 22 (39.6) 22 (39.6)

Time needed for diagnosis:  Less than 1 s

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.