Diagnostic Test

WARNING: This page is about a different car, the 2023 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.

VISUALLY INSPECT THE FUEL FILLER CAP/CAPLESS FUEL FILLER

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
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
- Repair as necessary.
- Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Perform the P0455-EVAP SYSTEM LARGE LEAK diagnostic procedure. Refer to P0455-EVAP SYSTEM LARGE LEAK .