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Home >> Subaru >> 2015 >> WRX Limited, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) (STI)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0071 Ambient Temperature Sensor Circuit "A" Range/Performance >> 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 

JUDGMENT VALUE SPECIFICATION

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)

Map 

TEMPERATURE RESISTANCE SPECIFICATION - MAP

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:  64 ms

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