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Home >> Subaru >> 2010 >> Outback Limited >> Repair and Diagnosis (Single Page) >> 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) >> Enable Condition
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Enable Condition

Rich → lean diagnosis response

ENABLE CONDITION CHART

Secondary Parameters Enable Conditions
Battery voltage ≥ 10.9 V
A/F main feedback control condition Complete
Deceleration fuel cut time of 5000 ms or more (intermediate)
Deceleration fuel cut time of 5000 ms or more (wide)
Experienced
After fuel cut ≥ 2000 ms (Intermediate)
≥ 2000 ms (Wide)
Estimated temperature of the rear oxygen sensor element ≥ 500°C (932°F) (Intermediate)
≥ 500°C (932°F) (Wide)
Number of deceleration fuel cut ≥ 1 time(s)


Lean → rich response diagnosis

ENABLE CONDITION CHART

Secondary Parameters Enable Conditions
Battery voltage ≥ 10.9 V
A/F main feedback control condition Complete
Deceleration fuel cut time is 6000 ms or more. Experienced
After fuel cut ≥ 2000 ms
Number of deceleration fuel cut ≥ 1 time(s)