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Home >> Subaru >> 2021 >> Crosstrek Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Control System (2.5L) (Diagnostics) (1 Of 4)) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0031: A/F/O2 Heater Control Circuit Low Bank 1 Sensor 1 >> 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
Output voltage Less than 2.3 V

Time needed for diagnosis:  1 s

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.

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