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Home >> Subaru >> 2015 >> Outback 2.5i >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0071 Ambient Temperature Sensor Circuit "A" Range/Performance >> 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

Malfunction Criteria Threshold Value
|Ambient air temperature 30 sec. after engine start - Intake air temperature 30 sec. after engine start| > Value from Map
|Ambient air temperature at engine start - Engine coolant temperature at engine start| > 25 °C (45°F)
AMBIENT AIR TEMPERATURE REFERENCE

Ambient air temperature °C (°F) -30 (-22) 30 (86) 45 (113) 60 (140)
|Ambient air temperature 30 sec. after engine start - Intake air temperature 30 sec. after engine start| °C (°F) 20 (36°F) 20 (36°F) 32 (57.6°F) 32 (57.6°F)

Time Needed for Diagnosis:  Less than 1 second

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.