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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 48 (Engine Control System Diagnosis - 2.0L (3 Of 3) (Except HEV)) >> DTC P2271: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 2) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible cause
DTC Strategy
  • Plausibility check during shift of lambda setpoint to rich or lean
  1. Poor connection or damaged harness
  2. Rear HO2S
Enable Conditions
  • No fuel cut-off
  • No full load phase
  • No catalyst overheating protection
  • Battery voltage is between 11 V and 16 V
Threshold value
  • Rear HO2S signal > 0.2 V when lambda set point = 1.15
Diagnosis Time
  • 7 sec after lambda set point shift to corresponding side
MIL On Condition
  • 2 Driving Cycles
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