2022 Dodge Charger P0440 Code: EVAP System Diagnosis & Repair Guide

Tracking Down the P0440 Code on Your 2022 Dodge Charger

The P0440 code on your 2022 Dodge Charger indicates the Powertrain Control Module (PCM) has flagged a malfunction in the evaporative emission control (EVAP) system. Your LD-platform muscle sedan uses Stellantis' EVAP architecture, and a systematic investigation will identify the cause.

The 2022 Charger EVAP System

Available with the 3.6L Pentastar V6, 5.7L HEMI, 6.4L HEMI, or 6.2L supercharged HEMI, all Chargers share the same EVAP components:

• NVLD Module — Natural Vacuum Leak Detection for passive leak testing
• Purge Solenoid Valve — Engine bay-mounted vapor routing
• Vent Valve — Near the charcoal canister, system sealing and venting
• Charcoal Canister — Fuel vapor storage
• Fuel Filler Cap — Twist-on with rubber gasket

Ranked Causes

1. Gas Cap Seal Issue (30% of cases) — After 2–3 years, the gasket begins to wear. Cost: $10–$22.
2. NVLD Module (22%) — Passive leak detection module degradation. Cost: $35–$80, $100–$230 with labor.
3. Purge Solenoid Valve (20%) — Heat exposure from performance engines accelerates wear. Cost: $25–$60, $90–$210 with labor.
4. EVAP Hose Deterioration (13%) — Heat cycling and age. Cost: $10–$35, $75–$185 with labor.
5. Vent Valve (10%) — Undercarriage exposure. Cost: $30–$65, $90–$220 with labor.
6. Charcoal Canister (5%) — Saturation from overfilling. Cost: $80–$200, $170–$350 installed.

Diagnostic Steps

1. Gas Cap — Inspect, clean, reseat or replace ($10–$22). Clear code and monitor.
2. Companion Codes — Scan for P0441, P0442, P0456. Use wiTECH or an advanced scanner for Stellantis-specific data.
3. NVLD Module Check — Near the charcoal canister. Verify electrical connector and vacuum lines.
4. Purge Valve Test — Engine bay, listen for clicking, verify resistance.
5. Smoke Test — $80–$150 for definitive leak detection.

Warranty and DIY

Warranty: Your 2022 Charger's 3-year/36,000-mile basic warranty may still be active. The 5-year/60,000-mile powertrain warranty may cover certain components. Verify before paying.

For DIY, the Charger provides reasonable engine bay access for the purge valve. NVLD and vent valve require undercarriage access.

The Verdict

Your 2022 Charger's P0440 most likely comes down to the gas cap, NVLD module, or purge valve. The investigation is the same whether you've got a V6 or a Hellcat — start with the cheap gas cap and let companion codes guide the rest.