P0442 on Your 2023 Dodge Challenger — The Last HEMI
A P0442 code on your 2023 Dodge Challenger points to a small evaporative emission system leak. As the final model year for the ICE-powered Challenger, your 2023 represents the culmination of this legendary platform — and any EVAP issues are fully warranty-covered.
EVAP System Details
The 2023 Challenger uses Stellantis's NVLD (Natural Vacuum Leak Detection) system. Whether you have the Pentastar V6, 5.7L HEMI, 6.4L HEMI, or the supercharged 6.2L Hellcat, the EVAP architecture is the same. The NVLD monitors system integrity through vacuum changes, working with the purge solenoid and charcoal canister.
Likely Causes
- Gas cap not fully seated (45%) — The most common cause on any newer vehicle. Quick fuel stops can lead to incomplete cap closure.
- Gasket contamination (20%) — Debris on the gas cap gasket surface.
- EVAP hose fitting looseness (15%) — A connection that vibrated loose during early driving.
- NVLD device defect (10%) — A rare factory defect in the leak detection system.
- Purge solenoid defect (10%) — A manufacturing seal imperfection.
What to Do
Reseat your gas cap firmly. If the code returns, bring your Challenger to a Dodge dealer for warranty repair. The wiTECH diagnostic system provides comprehensive EVAP testing. All repairs should be at no cost.
Cost Estimates (Reference — $0 Under Warranty)
- Gas cap: $15–$40
- EVAP hose repair: $100–$260
- NVLD: $130–$310
- Purge solenoid: $110–$260
Warranty and Parts
Your 2023 Challenger is within the 3-year/36,000-mile basic warranty and 5-year/60,000-mile powertrain warranty. All parts remain available through Stellantis. Do not pay out of pocket — this is a warranty-covered repair.