P0455 on Your 2023 Dodge Challenger — The Final Year
Your 2023 Challenger is the last of the LC-platform muscle cars, and a P0455 means a large EVAP leak. Whether it's a SXT, R/T, Scat Pack, or Hellcat, the EVAP system is shared. Your 3-year/36,000-mile warranty runs through 2026—check your mileage.
Evidence to Look For
- Check engine light illuminated
- P0455 stored in PCM
- Fuel smell near the tank area
- Gas cap feels loose or worn
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Most common cause. $0–$25 for OEM Mopar replacement.
- NVLD Unit (Medium Likelihood): Stellantis Natural Vacuum Leak Detection module failure. $150–$300 installed.
- Purge Solenoid (Medium Likelihood): Stuck open or leaking. $100–$250 installed.
- EVAP Canister (Low-Medium Likelihood): Charcoal saturation. $200–$400 installed.
- Fuel Tank Pressure Sensor (Low Likelihood): Faulty reading. $120–$280 installed.
What to Do
Start with the gas cap—tighten or replace it and drive for 2–3 days. If P0455 persists, your Dodge dealer can diagnose with wiTECH. As the final model year, parts availability is excellent.
Warranty
Your 2023 Challenger's 3yr/36k warranty runs through 2026. Federal emissions (8yr/80k) covers EVAP through 2031. If under mileage, this could be a free repair.
Safe to Drive?
Yes. P0455 doesn't affect engine power, transmission, or any driving dynamics.