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Home >> Kia >> 2012 >> Optima LX, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) - 2.4L - Except HEV >> DTC P0136: O2 Sensor Circuit (Bank 1/Sensor 2) >> Inspection/Repair >> W/Harness Inspection >> Ground Circuit Inspection
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Ground Circuit Inspection

  1. Ignition "OFF".
  2. Disconnect HO2S connectors.
  3. Measure resistance between ground terminal of HO2S (B1S2) harness connector and chassis ground.

    Specification :  Approx. 0Ω

    For 2012

    Fig 1: Measuring Resistance Between Ground Terminal Of HO2S (B1S2) Harness Connector & Chassis Ground
    G07386314Courtesy of KIA MOTORS AMERICA, INC.

    For 2013 refer to ETM 

  4. Is resistance within the specification?

    YES 

    NO 

    • Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      NOTE:

      HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor wire(s). Do not attempt to repair the wire(s), connector, or the terminals.