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Home >> Subaru >> 2019 >> Forester Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0037: A/F/02 Heater Control Circuit Low Bank 1 Sensor 2 >> General Description >> Diagnostic Method

Diagnostic Method

After starting the engine, perform the diagnosis continuously when engine is low speed.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Output voltage Battery voltage x 0.47 or less

Time needed for diagnosis:  10 s

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

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