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Home >> Kia >> 2017 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 2.4L (1 Of 3) (Except HEV) >> DTC P0140-00: O2 Sensor Circuit No Activity Detected (Bank 1/Sensor 2) >> Wiring Inspection >> Terminal and Connector Inspection

Terminal and Connector Inspection

  1. Many malfunctions in the electrical system are caused by poor harness and terminals.

    Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

  2. Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
  3. Has a problem been found?
    Fig 1: Oxygen Sensor Circuit Diagram
    G12132413Courtesy of KIA MOTORS AMERICA, INC.

    YES 

    NO