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Home >> Subaru >> 2023 >> WRX Base, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0140: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2 >> Execution Condition
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Execution Condition

Secondary parameters Execution condition
Battery voltage 10.9 V or more
Estimated temperature of the rear oxygen sensor element 450°C (842°F) or more
Cumulative duty ratio of the rear oxygen sensor heater after engine starting 54400% or more
Rear oxygen sensor offset signal More than 1.8 V
and
Less than 2.2 V
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