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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 57 (Engine Control System Diagnosis (2 Of 2) (HEV)) >> DTC P2271: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 2) >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

WARNING: This page is about a different variant/trim than selected.
Item Detecting Condition Possible cause
DTC Strategy
  • Downstream O2 sensor signal too high
  1. Poor connection or damaged harness
  2. Rear HO2S
Enable Conditions
  • No fuel cut-off
  • No full load phase
  • No catalyst overheating protection
  • 11V < Battery voltage < 16V
Threshold value
  • Rear HO2S signal > 0.2V when lambda set point = 1.15
Diagnosis Time
  • 7 sec after lambda set point shift to corresponding side
MIL On Condition
  • 2 driving cycle
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