Home >> Subaru >> 2008 >> Tribeca Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Diagnostic Trouble Code (DTC) Detecting Criteria (H6DO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P1153 O2 Sensor Circuit Range/Performance (High) (Bank 1 Sensor 1) >> Fail Safe