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Home >> Subaru >> 2021 >> Outback Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (2.5L) (Diagnostics) (1 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0071: Ambient Air Temperature Sensor Circuit "A" Range/Performance >> General Description >> 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 SPECIFICATION

Malfunction Criteria Threshold Value
|Ambient air temperature 21 sec. after first engine start - Intake air temperature 21 sec. after first engine start| More than value of Map
|Ambient air temperature at first engine start - Engine coolant temperature sensor 2 at first engine start| More than 24°C (43°F)
TEMPERATURE SPECIFICATION - MAP

Ambient temperature (°C (°F)) -30 (-22) 45 (113) 60 (140) 80 (176)
|Ambient air temperature 21 sec. after first engine start - Intake air temperature 21 sec. after first engine start|
(°C (°F))
20 (36) 20 (36) 32 (57.6) 32 (57.6)

Time needed for diagnosis:  Less than 1 s

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