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Home › Kia › 2015 › Optima Hybrid › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (1 Of 3) (HEV) › DTC P0135: O2 Sensor Heater Circuit-Bank 1 Sensor 1 › DTC Inspection › Monitor DTC Status

Monitor DTC Status

  1. Connect GDS to Data Link Connector (DLC).
  2. Ignition "ON"
  3. Monitor "Diagnostic Trouble Codes (DTC)" with GDS.
    Fig 1: Current DTC Status
    G00551239Courtesy of KIA MOTORS AMERICA, INC.
  4. Is DTC status displayed as Present?

    YES 

    NO 



  1. Connect GDS to DLC (Data Link Cable).
  2. Warm up the engine to normal operating temperature.
  3. Check the "Current Data" about related DTC with GDS.
    Fig 1: Engine Idle After Warm Up & Lambda Closed Loop Active
    G00550868Courtesy of KIA MOTORS AMERICA, INC.
  4. Are the parameters displayed correctly?

    YES 

    • Fault is intermittent caused by poor contact in the sensor's and/ or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

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