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HOMESERVICE MANUALSHYUNDAI2005SANTA FE GLS, 2.7 D, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (ENGINE CONTROL SYSTEM DIAGNOSIS (3.5L) (1 OF 2))DTC TROUBLESHOOTING PROCEDURESDTC P0150: HO2S CIRCUIT (BANK 2/ SENSOR 1)COMPONENT INSPECTION
2005 Hyundai Santa Fe GLS, 2.7 D, AWD

Component Inspection

2005 Hyundai Santa Fe GLS, 2.7 D, AWDSECTION Component Inspection
WARNING: This page is about a different variant/trim than selected.
  1. Visual Inspection of HO2S
    1. Visually/physically inspect following items:
      • Inspect the front HO2S for Contaminated, deteriorated or aged Front HO2S.
      • If contamination is evident on the HO2S, replace contaminated sensor.
    2. Is the HO2S visually/physically OK?

      YES 

      • Go to next step .

      NO 

      • Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  2. Check performance of HO2S
    1. Connect scan tool & Engine "ON"
    2. Warm-up the engine to normal engine temperature.
    3. Monitor signal waveform of HO2S with scan tool

      Specification : Voltage will vary between 0.1 and 0.9V

      Fig 1: Scan Tool - Monitor Signal Waveform Of HO2S
      G03845516Courtesy of HYUNDAI MOTOR CO.
    4. Is the sensor switching properly?

      YES 

      • Go to next step .

      NO 

      • Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  3. Check PCM
    1. Ignition "OFF"
    2. Connect Scan tool and Ignition "ON"
    3. Select simulation function on scan tool.
    4. Simulate voltage at terminal 1 of HO2 sensor signal connector.
      NOTE: Keep in mind Never simulate voltage over 1V because output voltage range of HO2S is 0.1 ~ 0.9V
RENDER: 1.0x

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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.