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Home >> Subaru >> 2021 >> Crosstrek Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Control System (2.0L (Except For HEV)) (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

WARNING: This page is about a different variant/trim than selected.

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

JUDGMENT VALUE SPECIFICATIONS

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 at first engine start| More than 25°C (45°F)
TEMPERATURE SPECIFICATIONS - MAP

Intake air 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.