SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSHYUNDAI2005ELANTRA GLS, 4D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALFUEL SYSTEMDTC TROUBLESHOOTING PROCEDURESDTC P2271: O2 SENSOR SIGNAL STUCK RICH (BANK 1 / 2 SENSOR 1)DTC DETECTING CONDITION
2005 Hyundai Elantra GLS, 4D Hatchback, Automatic

DTC P2271: O2 Sensor Signal Stuck Rich (Bank 1 / 2 Sensor 1): DTC Detecting Condition

2005 Hyundai Elantra GLS, 4D Hatchback, AutomaticSECTION DTC Detecting Condition
DTC DETECTING CONDITION

Item Detecting Condition Possible Cause
DTC Strategy
  • Plausibility check during shift of lambda setpoint to rich or lean
  • Three Way Catalytic Converter (TWC)
  • Restriction in exhaust system
  • Rear HO2S
Enable Conditions
  • No fuel cut-off
  • No full load phase
  • No fuel trim error detected
  • Delay time to start diagnosis : 13 ~ 30 sec., depending on operation point
  • 11V < Battery voltage < 16V
  • No relevant failure
Threshold Value
  • Rear HO2S signal > 0.2 V when lambda set point = 1.15
Diagnostic Time
  • 30 sec.
Fail Safe  
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.