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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 127 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4DO)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2) >> Enable Condition

Enable Condition

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Rich → lean diagnosis response

ENABLE CONDITION REFERENCE 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) Experienced
Deceleration fuel cut time of 5000 ms or more (wide)  
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 REFERENCE 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)