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Home >> Hyundai >> 2019 >> Accent Limited >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> DTC Inspection >> Monitoring DTC Status
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Monitoring DTC Status

  1. Connect GDS to DLC (Data Link Cable).
  2. Warm up the engine to normal operating temperature.
  3. Monitor "HO2S (S1)" parameter on the "Current Data" with GDS.
    G12593775Courtesy of HYUNDAI MOTOR AMERICA
  4. Are the parameters displayed correctly?

    YES 

    • This can be an intermittent fault caused by poor contact of the sensor's and/or ECM (PCM)'s connector. Or, ECM (PCM) memory was not cleared after repair. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace the relevant component (s) as necessary, and go to "Verification of Vehicle Repair ".

    NO 

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