Tracking P0455 on Your 2022 Jeep Grand Wagoneer
A P0455 on your 2022 Grand Wagoneer means the PCM found a large EVAP leak. Your 6.4L HEMI V8 with 471 hp runs fine—this is a vapor system code. Check the gas cap first on this flagship SUV.
Symptoms
- Check engine light with P0455
- Possible fuel odor
- Gas cap not seating
- EVAP readiness incomplete
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$25.
- EVAP Canister Vent Valve (Medium Likelihood): Stellantis vent valve. $160–$320 installed.
- Purge Solenoid (Medium Likelihood): Stuck open. $150–$300 installed.
- Vapor Line (Low Likelihood): Connection issue. $100–$260.
- Charcoal Canister (Low Likelihood): Rare on new vehicles. $220–$440 installed.
Warranty
Your 2022 Grand Wagoneer may still be under the 3-year/36,000-mile warranty. As a premium vehicle, the dealer experience should be top-tier. Federal emissions warranty (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the 6.4L HEMI, 8-speed, 4WD, air suspension, or any luxury features.