Decoding the P0440 on Your 2023 Dodge Challenger
A P0440 code on your 2023 Dodge Challenger — the final model year of this legendary muscle car — indicates an EVAP system malfunction. As the last production year, your Challenger benefits from decades of refinement, and this code is typically a minor issue resolved under warranty.
The Final Challenger's EVAP System
The 2023 Challenger's EVAP system, proven across years of the LC platform:
- NVLD Module — Stellantis' refined Natural Vacuum Leak Detection
- Purge Solenoid Valve — Vapor routing to the intake
- Vent Valve — System sealing and atmospheric venting
- Charcoal Canister — Vapor storage
- Fuel Filler Cap — Traditional screw-on style
Most Likely Causes
- Gas Cap Not Seated (32%) — Incomplete twist after fueling. Cost: $0 to reseat, $10–$22 for new cap.
- NVLD Module (20%) — Intermittent issue. Cost: $0 under warranty.
- Purge Valve (18%) — Possible defect or early wear. Cost: $0 under warranty.
- Factory Connection (12%) — Hose not fully seated. Cost: $0 under warranty.
- Vent Valve (10%) — Premature failure. Cost: $0 under warranty.
- Software Update (8%) — PCM calibration. Cost: $0 under warranty.
Warranty Coverage
Your 2023 Challenger should be under Stellantis' warranty:
- Basic: 3 years/36,000 miles
- Powertrain: 5 years/60,000 miles
Try the gas cap first. If the code persists, schedule a dealer appointment.
The Verdict
The final-year 2023 Challenger's P0440 is most likely a gas cap issue or warranty-covered component. As a collector-grade final model, use authorized Dodge service to maintain the vehicle's complete service history and value.