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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (Except For STI) (1 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0037: A/F/O2 Heater Control Circuit Low Bank 1 Sensor 2 >> 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

Malfunction Criteria Threshold Value
Output voltage ≤ 2.2 V

Time needed for diagnosis:  2500 ms

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

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