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Home >> Kia >> 2011 >> Soul Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System Diagnosis (1 Of 2) - 1.6L >> DTC P0139: O2 Sensor Circuit Slow Response (Bank 1/Sensor 2) >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item Detecting Condition Possible Cause
DTC Strategy
  • No signal activity
  • Poor connection
  • leak or clog in intake air system
  • Injector
  • Fuel pressure
  • S2
General Enable Conditions
  • Downstream O2S voltage before fuel cut > 0.55V
  • Fuel System Status: Fuel cut off
  • EGT around downstream O2S > 400°C
  • Downstream O2S internal resistance < 2500Ω
  • B+ > 10.7V
  • Exhaust gas mass flow > 10.0 8kg/h
  • After enough heated > 25 sec
Threshold Value
  • Output signal from rear HO2S isn't increased up to specification level within a short time after fuel cut.
Diagnostic Time
  • -
MIL ON Condition
  • 2 driving cycle

* S1: upstream oxygen sensor/S2: downstream oxygen sensor