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Home >> Subaru >> 2024 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0134: A/F/O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 >> General Description >> Diagnostic Method
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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
Input voltage (+)
Or,
More than 2.65 V
Sensor reference voltage
Or,
3.6 V or less
Input current -45 μA or more
and
45 μA or less

Time needed for diagnosis 

Input voltage (+): 30 seconds

Sensor reference voltage: 2 seconds

Input current: 2 seconds

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