Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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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 P0136: HO2S CIRCUIT (BANK 1/ SENSOR 2)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.

Visual Inspection of HO2S
1. Visually/physically inspect following items:
  - Inspect the rear HO2S for Contaminated, deteriorated or aged Rear 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.
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.
  
  Fig 1: Scan Tool Simulation Function
  Courtesy of HYUNDAI MOTOR CO.
5. Does the HO2 sensor signal value changes according to simulation voltage?
  YES
  - Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

RENDER: 1.0x

NO RELATED

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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.