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Home >> Subaru >> 2021 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2.5L) (4 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P2195: A/F/O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 >> 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
λ value
Output voltage value of rear oxygen sensor
> 1.15
> 0.55V

time needed for diagnosis:  10000 ms

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