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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 38 (Engine Control System Diagnosis - 1.6L (3 Of 3) (Except HEV)) >> DTC P1111: Cylinder Pressure Too High >> System Inspection

System Inspection

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

■ Visual check 

  1. Check engine oil gauge.
  2. Check contamination of engine oil.
  3. Check clog of oil path.
  4. Is there any problem?

    YES 

    NO 

    • Go to "Spark plug check" procedure.

■ Spark plug check 

  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: 0.9 - 1.0 mm (0.035 - 0.039 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 

    • Go to "Injector check" procedure below.

    NO 

■ Injector check 

  1. IG KEY "OFF".
  2. Remove injectors.
  3. Check leakage or clog on injectors.
  4. Measure the resistance between power and control terminal of the injector. (Component side)

    Specification:  1.5 ± 0.075 Ω (20°C (68°F))

    YES 

    • Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. So, check poor connections and the related circuit between ECM and component thoroughly. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO