Tracking Down the P0440 on Your 2022 Dodge Challenger
The P0440 code on your 2022 Dodge Challenger signals an EVAP system malfunction. Your LC-platform muscle car, whether V6 or HEMI-powered, shares its EVAP system with the Charger — and the same common failure points. Let's investigate.
The 2022 Challenger EVAP System
All engine variants share the same Stellantis EVAP architecture:
- NVLD Module — Natural Vacuum Leak Detection passive testing
- Purge Solenoid Valve — Engine bay vapor routing
- Vent Valve — System venting and sealing near the charcoal canister
- Charcoal Canister — Vapor storage
- Fuel Filler Cap — Screw-on with rubber gasket
Ranked Causes
- Gas Cap Seal (30% of cases) — After 2–3 years, the gasket begins to degrade. Cost: $10–$22.
- NVLD Module (22%) — Vacuum switch degradation. Cost: $35–$80, $100–$230 with labor.
- Purge Valve (20%) — Heat stress from performance engines. Cost: $25–$60, $90–$210 with labor.
- EVAP Hose Issues (13%) — Heat and vibration damage. Cost: $10–$35, $75–$185 with labor.
- Vent Valve (10%) — Undercarriage exposure. Cost: $30–$65, $90–$220 with labor.
- Charcoal Canister (5%) — Overfilling consequences. Cost: $80–$200, $170–$350 installed.
Diagnostic Steps
- Gas Cap — Inspect, replace if worn ($10–$22). Clear code and monitor.
- Companion Code Scan — P0441, P0442, P0456 narrow the search.
- NVLD Module — Check near charcoal canister, verify connector and vacuum lines.
- Purge Valve — Engine bay, listen for clicking, verify resistance.
- Smoke Test — $80–$150 at a shop.
Warranty and DIY
Warranty: The 3-year/36,000-mile warranty may still cover your 2022. The 5-year/60,000-mile powertrain warranty may apply. Verify first.
For DIY, the Challenger provides reasonable access to EVAP components. The purge valve is accessible from the engine bay (tighter on HEMI models), and undercarriage components are reachable with jack stands.
The Verdict
Your 2022 Challenger's P0440 follows the Stellantis playbook — gas cap first, then NVLD and purge valve. Check warranty coverage before paying out of pocket. Parts are shared with the Charger, making them widely available.