Investigating P0455 on Your 2020 Dodge Challenger
P0455 on your 2020 Challenger means a large EVAP leak. Whether you have the V6, 5.7L HEMI, 6.4L 392, or supercharged Hellcat, the EVAP system is shared. Gas cap first.
Symptoms
- Check engine light with P0455
- Possible fuel smell
- Gas cap worn
- Emissions test failure
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Degraded after 4+ years. $10–$25.
- EVAP Canister Vent Valve (Medium Likelihood): FCA vent valve. $150–$300 installed.
- Purge Solenoid (Medium Likelihood): Sticking. $140–$280 installed.
- Vapor Line (Low Likelihood): Heat damage near engine. $100–$250.
- Charcoal Canister (Low Likelihood): Saturated. $200–$400 installed.
Warranty
Basic warranty (3yr/36k) has expired. Federal emissions (8yr/80k) covers EVAP through 2028.
Safe to Drive?
Yes. P0455 doesn't affect any engine, supercharger, or performance.