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Home >> Kia >> 2019 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 1.6L (2 Of 6) (Except HEV) >> DTC P0141: O2 Sensor Heater Circuit (Bank 1/Sensor 2) >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Heater current check
  1. Poor connection
  2. Open or short to ground in power circuit
  3. Open in control circuit
  4. HO2S (S2)
  5. Corrosion
Enable Conditions
  • Dew point end detected
  • Battery voltage is greater than 11V
  • Exhaust Gas temperature is 350°C (662°F) to 800°C (1472°F)
  • No downstream O2 sensor heater error
  • Engine stop time greater than 120s
  • IAT greater than -9.8°C (14.36°F)
Threshold Value
  • Internal resistance value greater than Threshold value
Diagnostic Time
  • 6s
MIL ON Condition
  • 3 driving cycles

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

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