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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Engine Control System Diagnosis - 2.0L (2 Of 3) (Except HEV)) >> DTC P03B9: Cylinder 4 Pressure Too High >> System Inspection

System Inspection

WARNING: This page is about a different variant/trim than selected.

■ Engine Oil Inspection 

  1. Check the engine oil level.

    Specification:  Oil level should be between the "L" and "F" marks on the dipstick

  2. Check the engine oil quality (oil deterioration, entry of water, discoloring of thinning).
  3. Has a problem found above procedures?

    YES 

    NO 

    • Go to next step below.

■ Spark Plug Inspection 

  1. Remove cylinder's spark plugs
  2. Visually/physically inspect the following components:
    • Damaged insulation, Worn electrodes, Oil or fuel fouled, Loose terminals and cracks.
    • Check for plug gap: 0.7 ~ 0.8 mm (0.028 ~ 0.031 in.)
    • Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
  3. Has a problem been found in any of the above areas?

    YES 

    NO 

    • Go to next step below.