P0455 on Your 2024 Jeep Grand Cherokee
A P0455 on your 2024 Grand Cherokee WL means the PCM detected a large EVAP leak. Whether you have the 3.6L V6 or 5.7L HEMI V8, your Grand Cherokee is fully under warranty. The gas cap is the first place to look.
Evidence
- Check engine light with P0455
- Possible fuel odor
- Gas cap not clicking
- EVAP readiness monitor incomplete
Causes Ranked
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- EVAP Canister Vent Valve (Medium Likelihood): Stellantis vent valve. Warranty-covered.
- Purge Solenoid (Medium Likelihood): Stuck open. Warranty-covered.
- Vapor Line (Low Likelihood): Assembly issue. Warranty-covered.
- Software Calibration (Low Likelihood): PCM update needed. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit your Jeep dealer for free warranty repair. The dealer uses wiTECH for diagnostics.
Warranty
Your 2024 Grand Cherokee is fully covered by Stellantis's 3-year/36,000-mile warranty through 2027. Federal emissions warranty (8yr/80k) extends through 2032.
Safe to Drive?
Yes. P0455 doesn't affect the engine, 4WD, Quadra-Trac/Quadra-Drive, air suspension, or any features.