Home >> Subaru >> 2021 >> Legacy Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (2.5L) (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 >> Execution Condition