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Home >> Kia >> 2019 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 1.6L (2 Of 6) (Except HEV) >> DTC P0136: O2 Sensor Circuit (Bank 1/Sensor 2) >> Component Inspection >> Visual Check

Visual Check

  1. Ignition "OFF" and disconnect HO2S (S2) connector.
  2. Check that HO2S (S2) is contaminated or damaged by foreign materials.
  3. Does the HO2S (S2) work properly? (Check variation)

    YES 

    NO 

    • Carefully re-do this troubleshooting guide steps.
    • If problem still occurs, replace HO2S (S2) and then Go to "System Inspection" procedure.
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