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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 >> Outline Of Diagnosis

Outline Of Diagnosis

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Detect the malfunction of ambient temperature sensor characteristics.

After the engine starts after the specified period of soaking time has elapsed, judge by correlation between ambient temperature sensor value, intake air temperature sensor value and engine coolant temperature sensor value. Judge as NG when the differences are both above the specified value by comparing between ambient air temperature and intake air temperature, ambient air temperature and engine coolant temperature.