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Home >> Kia >> 2017 >> Optima SX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (1 Of 3) (Except HEV) >> DTC P0140-00: O2 Sensor Circuit No Activity Detected (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
  • Signal Plausibility with lean mixture (During Fuel Cut Off)
  1. Poor Connector Connection
  2. Faulty Downstream O2 Sensor
Enable Conditions
  • Downstream O2 Sensor operative readiness detected (sensor element resistance < 1kΩ or heater max heating or normal heating for > 75 s.)
  • Integrated mass air flow since last fuel cut off more than 500 g
  • Integrated mass air flow since fuel cut off begin more than 12 g and less than 250 g
  • Battery voltage higher than 11 V and lower than 16 V
  • No relevant DTC present
Threshold Value
  • Downstream O2 Sensor Voltage higher than 0.2V
Diagnostic Time
  • 5 s.
Mil On Condition
  • 2 Driving Cycles