P0455 on Your 2022 Ram 3500
A P0455 on your 2022 Ram 3500 means a large EVAP leak. This applies to gas-powered 3500s with the 6.4L HEMI. Cummins diesels have different emissions systems. Gas cap first.
Symptoms
- Check engine light with P0455
- Possible fuel odor
- Gas cap issue
- EVAP readiness incomplete
Causes Ranked
- 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): Heavy-duty use damage. $100–$260.
- Charcoal Canister (Low Likelihood): Saturated. $210–$420 installed.
Warranty
Your 2022 Ram 3500 may still be under the 3-year/36,000-mile warranty. Federal emissions (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the 6.4L HEMI, 4WD, towing, or dually features.