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Home >> Subaru >> 2018 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 4) (Except For STI) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0141: O2 Sensor Heater Circuit 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
Rear oxygen sensor heater current < Value from Map
BATTERY VOLTAGE SPECIFICATION - MAP

Battery voltage (V) 10.9 12 13 14 15 16
Threshold Value (mA) 330 357.5 385 412.5 440 467.5

Time needed for diagnosis:  10 seconds

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