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Home >> Kia >> 2011 >> Rio LX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC P0139: O2 Sensor Circuit Slow Response (Sensor 2) >> General Information >> DTC Detecting Condition
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General Information: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item Detecting Condition Possible Cause
DTC Strategy
  • Response rate
  • Poor connection
  • leak or clog in intake air system
  • Injector
  • Fuel pressure
  • B1S2
  • ECM
Enable Conditions
  • Time after fuel cut-off > 5 s
  • Integrated air mass after fuel cut-off > 15 g (0.53oz.)
  • Time after dew point end detected > 30 s
Threshold Value
  • B1S2 sensor voltage > 0.15 V
Diagnostic Time
  • 0.2 sec
MIL ON Condition
  • 2 driving cycle

* B1S1 : upstream oxygen sensor/B1S2 : downstream oxygen sensor