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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (5.7L - DTCS P0456 To P0629) >> DTC Troubleshooting >> P0457-EVAP System - Loose Fuel Cap >> Diagnostic Test

Diagnostic Test

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VISUALLY INSPECT THE FUEL FILLER CAP/CAPLESS FUEL FILLER 

  1. Visually inspect for the following:
    • Loose, missing, or damaged Fuel Filler Cap or seal
    • Damaged locking tabs on the Fuel Filler Cap and/or filler tube
    • Damaged seal points on the Fuel Filler Cap and/or filler tube
  2. If the vehicle is equipped with the Capless Fuel Filler Assembly, visually inspect the flap and seal for proper sealing.

    Were any problems found?

    Yes 

    No