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Home >> Kia >> 2019 >> Optima SX Limited >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (5 Of 6) (HEV) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> DTC Inspection >> Monitor DTC Status
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Monitor DTC Status

  1. Connect KDS to Data Link Connector (DLC).
  2. Ignition "ON".
  3. Monitor "Diagnostic Trouble Codes (DTC)" with KDS.
    G13067703Courtesy of KIA MOTORS AMERICA, INC.
  4. Is DTC status displayed as Present?

    YES 

    NO