P0456 on Your 2023 Dodge Charger
A P0456 code on your 2023 Dodge Charger—the final model year of the legendary LD-platform Charger—means the PCM has detected a very small leak (0.020-inch equivalent) in the EVAP system. While seeing a check engine light on a relatively new vehicle is frustrating, P0456 on a 2023 model is typically caused by something minor and is fully covered under warranty.
Your 2023 Charger, whether equipped with the 3.6L V6, 5.7L HEMI, 6.4L Scat Pack, or supercharged Hellcat, uses Stellantis's NVLD (Natural Vacuum Leak Detection) system. The EVAP architecture is identical across all powertrains—this code has nothing to do with engine performance.
Likely Causes
- Gas cap not fully tightened (35%) — Even on a relatively new car, the most common cause is a cap that didn't get the final click.
- NVLD sensor sensitivity or fault (20%) — The NVLD unit can occasionally read slightly off on newer vehicles, or may have a marginal defect.
- Software calibration (18%) — Stellantis may have PCM calibration updates that adjust EVAP monitor sensitivity for the 2023 model year.
- EVAP connection not fully seated (12%) — A factory fitting that's not 100% engaged can create an intermittent micro-leak.
- Purge valve irregularity (10%) — A purge solenoid slightly out of spec can cause borderline EVAP test results.
- Filler assembly or tank seal (5%) — Occasionally, a seal doesn't fully bed in during early use.
What to Do
- Check the gas cap — Remove, inspect, and reseat firmly. Clear the code if you have a scanner.
- Dealer visit — With warranty coverage, the dealer is the right call. They'll use wiTech diagnostics and check for TSBs.
- Software update — The dealer applies any pending PCM calibrations.
- Physical diagnosis if needed — Smoke test and component replacement under warranty.
Costs
- Under warranty: $0—covered under 3-year/36,000-mile warranty through 2026
- Gas cap (DIY first try): $15–$30
- Federal emissions warranty: 8 years/80,000 miles through 2031
Warranty Notes
Your 2023 Charger is covered under Stellantis's 3-year/36,000-mile basic warranty through 2026 and the 5-year/60,000-mile powertrain warranty through 2028. The federal emissions warranty extends EVAP coverage to 8 years/80,000 miles. As the final year of the LD Charger, parts availability will remain strong for years to come.