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Home >> Hyundai >> 2025 >> Tucson XRT, Eng CD G4KN, FWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Except HEV) >> Heated Oxygen Sensor (HO2S) >> Repair Procedures >> Inspection >> Component Inspection

Component Inspection

  1. Disconnect the battery negative (-) terminal.
  2. Remove the HO2S connector.

    (Refer to "Removal " procedure)

  3. Measure resistance between HO2S heater terminals.

    Bank1/Sensor1:  Terminal 4 - Terminal 5

    Bank1/Sensor2:  Terminal 3 - Terminal 4

  4. Check the resistance is within the specification.

    Specification 

    Bank 1/Sensor 1: 2.8 - 4.5Ω Bank 1/Sensor 2: 3.3 - 4.1Ω

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