Solving P0455 on Your 2022 Jeep Grand Cherokee
A P0455 on your 2022 Grand Cherokee WL signals a large EVAP leak. This all-new generation with the 3.6L V6 or 5.7L HEMI is likely still under warranty. Start your investigation with the gas cap.
Symptoms
- Check engine light with P0455
- Possible fuel odor
- Gas cap issue
- Emissions monitor incomplete
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$25.
- EVAP Canister Vent Valve (Medium Likelihood): Stellantis vent valve. $150–$300 installed.
- Purge Solenoid (Medium Likelihood): Stuck open. $140–$280 installed.
- Vapor Line (Low Likelihood): Connection issue. $100–$250.
- Charcoal Canister (Low Likelihood): Rare on newer vehicles. $200–$420 installed.
Diagnosis
Tighten the gas cap and drive 2–3 days. If P0455 returns, visit your Jeep dealer. wiTECH diagnostics can pinpoint the issue. A smoke test confirms the leak location.
Warranty
Your 2022 Grand Cherokee may still be under the 3-year/36,000-mile warranty. Federal emissions warranty (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the engine, 4WD, or any luxury/safety features.