Home >> Subaru >> 2014 >> Impreza Base, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnostic Trouble Code (DTC) Detecting Criteria (Except Hybrid) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0134: O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) >> Enable Condition