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Home >> Kia >> 2023 >> Soul GT Line >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (6 Of 6) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> System Inspection >> Visual Inspection >> Inspection Procedure
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Inspection Procedure

  1. Refer to "HEATED OXYGEN SENSOR (HO2S) " and visually and/or physically inspect following conditions;
    • Proper installation of O2 Sensors.
    • Check for corrosion on terminals.
    • Check for damaged wiring.
    • Fuel, engine coolant or oil contamination.
    • Check for good ground for O2 sensor
  2. Has any problems been found?

    Good 

    No Good