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Home >> Genesis >> 2021 >> G90 5.0 Ultimate, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System Diagnosis - 3.3L (6 Of 9)) >> DTC P0451-00: Evaporative Emission System-Pressure Sensor Range/Performance >> Component Inspection >> Fuel Filler Cap Inspection

Fuel Filler Cap Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Check fuel filler cap for being tightly installed, has o-ring seal installed and is in good condition.
  2. Verify cap releases pressure/vacuum at specified values

    Specification:  Approx. 2 psi pressure and approximately 1.5 inches of mercury vacuum.

    G14204853Courtesy of HYUNDAI MOTOR AMERICA
  3. Are cap, o-ring and release pressures okay?

    YES 

    • Thoroughly check fuel filler pipe for cracks, damage and o-ring seat for deformation and replace as necessary. Go to next step as below.

    NO