Investigating P0455 on Your 2022 Dodge Challenger
A P0455 on your 2022 Challenger (LC platform) signals a large EVAP leak. Whether you have the 3.6L Pentastar V6, 5.7L HEMI, 6.4L 392 HEMI, or the supercharged 6.2L Hellcat, the EVAP system is the same. Your 3-year/36,000-mile warranty through 2025 has likely expired, but federal emissions coverage extends through 2030.
Clues and Symptoms
- Check engine light with P0455 stored
- Possible fuel odor near the rear
- Gas cap not clicking or seating properly
- Failed emissions inspection
Suspects Ranked by Likelihood
- Gas Cap Seal (Very High Likelihood): Worn or not seating. $0–$25 for a new Mopar cap.
- NVLD Unit (Medium Likelihood): Stellantis Natural Vacuum Leak Detection module. $150–$300 installed.
- Purge Solenoid (Medium Likelihood): Stuck open allowing vapor flow. $100–$250 installed.
- EVAP Canister (Low-Medium Likelihood): Charcoal canister saturated. $200–$400 installed.
- Fuel Tank Pressure Sensor (Low Likelihood): False reading. $120–$280 installed.
Diagnostic Path
Replace or tighten the gas cap and drive 2–3 days. If P0455 returns, a smoke test will pinpoint the leak. Any shop with wiTECH or a quality scan tool can diagnose Stellantis EVAP systems.
Warranty Coverage
Chrysler's 3yr/36k basic warranty has likely expired. Federal emissions warranty (8yr/80k) covers EVAP components through 2030. Check your mileage—you may still be covered.
Safe to Drive?
Yes. P0455 is a vapor system code only. HEMI performance, transmission, and all features are unaffected.