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Home >> Kia >> 2015 >> Optima Hybrid >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) (HEV) >> DTC P2271: O2 Sensor Signal Stuck Rich-Bank 1 Sensor 2 >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Electrical Monitoring
  1. Poor Connector Connection
  2. Defective Downstream O2 Sensor
Enable Conditions
  • No fuel cut-off
  • No Full load
  • No catalyst over heating protection
  • Battery voltage higher than 11V and lower than 16V
Threshold value
  • Downstream O2 Sensor Voltage less than 0.75 when lambda set point is 0.8
Diagnosis Time
  • 7 sec. after lambda set point shift to corresponding side
MIL On Condition
  • 2 Driving Cycles
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