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Home >> Kia >> 2019 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 6) (PHEV) >> DTC P0031-00: HO2S Heater Circuit low (Bank 1/Sensor 1) >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Electrical Check
  1. Poor Connector Connection
  2. Short to ground
  3. Faulty Upstream O2 Sensor
Enable Conditions
  • Engine speed during engine start higher than 32 RPM
  • Battery voltage higher than 11V and lower than 16V
Threshold Value
  • Short to ground
Diagnostic Time
  • Continuous
Mil On Condition
  • 2 Driving Cycles
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