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Home >> Kia >> 2021 >> Niro Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (3 Of 6) >> DTC P0300-00: Random/Multiple Cylinder Misfire Detected >> System Inspection >> Inspection Procedure

Inspection Procedure

  1. Remove the spark plugs.
  2. Visually/physically inspect the following items:
    • Damaged insulation, worn electrodes, oil or fuel fouled, loose terminals and cracks.
    • Check for plug gap: 0.7 to 0.8mm (0.028 to 0.031in.)
    • Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
  3. Have any problems been found?

    Good 

    No Good 

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