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Home >> Genesis >> 2021 >> G90 5.0 Ultimate, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 30 (Engine Control System Diagnosis - 3.3L (5 Of 9)) >> DTC P0300-00: Random/Multiple Cylinder Misfire Detected >> System Inspection >> Check Air Leakage

Check Air Leakage

WARNING: This page is about a different variant/trim than selected.
  1. Visually/physically inspect the air leakage in intake/exhaust system as following items,
    • Vacuum hoses for splits, kinks and improper connections.
    • Throttle body gasket
    • Gasket between intake manifold and cylinder head
    • Seals between intake manifold and fuel injectors
    • Exhaust system between exhaust manifold and Three way catalyst for air leakage.
  2. Has a problem been found in any of the above areas?

    YES 

    NO 

    • Go to "Check for air leakage in Positive Crankcase Ventilation Valve (PCV)"