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Home >> Kia >> 2020 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 1.6L (6 Of 6) (Except HEV) >> DTC P2251: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> System Inspection >> Check the fuel line

Check the fuel line

  1. Check the fuel line for following items
    • Connector status.
    • Damaged/bent/pressed/twisted fuel line.
    • Fuel leakage.
  2. Have any problems been found?

    YES 

    NO 

    • Go to "Check the fuel line" as follows.