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Home >> Subaru >> 2004 >> Baja Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0139: O2 Sensor Circuit Slow Response (Bank 1 Sensor 2) >> General Driving Cycle

General Driving Cycle

Perform the diagnosis only once during fuel cut at deceleration from the rapid acceleration. (Pay attention to oxygen sensor voltage when deciding the deceleration timing to calculate the diagnostic value.)