Solving P0455 on Your 2024 Jeep Gladiator
A P0455 on your 2024 Gladiator means the PCM detected a large EVAP leak. Your new Gladiator with the 3.6L Pentastar is fully under warranty. Start by checking the gas cap.
Symptoms
- Check engine light with P0455
- Possible fuel smell
- Gas cap not seating
- EVAP monitor incomplete
Causes Ranked
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- EVAP Canister Vent Valve (Medium Likelihood): Manufacturing issue. Warranty-covered.
- Purge Solenoid (Medium Likelihood): Factory defect. Warranty-covered.
- Vapor Line (Low Likelihood): Assembly issue. Warranty-covered.
- PCM Software (Low Likelihood): Calibration update. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit your dealer for free warranty repair.
Warranty
Your 2024 Gladiator 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 V6, 4WD, towing, or off-road features.