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Home >> Kia >> 2007 >> Sedona Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTC Troubleshooting Procedures (2 Of 2) >> DTC P2271 O2 Sensor Signal Stuck Rich (Bank 1 / 2 Sensor 1) >> Component Inspection

Component Inspection

  1. Visual Inspection
    1. Visually check HO2S as follow.
      • Contamination, deformation or age of HO2S (B1/S2)
    2. Is the HO2S (B1/S2) normal?

      YES 

      • Go to  2 "Check performance of HO2S" as follows.

      NO 

      • Substitute with a known-good HO2S (B1S2) and check for proper operation. If the problem is corrected, replace HO2S (B1S2) and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  2. Check performance of HO2S
    1. Connect scantool to DLC (Data Link Connector)
    2. Warm up the engine to normal operating temperature.
    3. Monitor signal waveform of HO2S with scantool.

      Specification: 0.1 ~ 0.9V.

      Fig 1: Signal Waveform Graph
      G04883614Courtesy of KIA MOTORS AMERICA, INC.
    4. Is the HO2S (B1S2) working properly?

      YES 

      • Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.

      NO 

      • Substitute with a known-good HO2S (B1 S2) and check for proper operation. If the problem is corrected, replace HO2S (B1S2) and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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