Decoding the P0440 on Your 2024 Cadillac Escalade
A P0440 code on your 2024 Cadillac Escalade signals an EVAP system malfunction. Your flagship luxury SUV is fully covered under Cadillac's premium warranty.
Most Likely Causes
- Capless Filler Debris (35%) — Dirt in the filler. Cost: $0.
- Factory Assembly (22%) — EVAP connection. Cost: $0 under warranty.
- Vent Valve Solenoid (15%) — GM common failure. Cost: $0 under warranty.
- Software (12%) — ECM update. Cost: $0 under warranty.
- Purge Valve (10%) — Defect. Cost: $0 under warranty.
- EVAP Hose (6%) — Routing. Cost: $0 under warranty.
Cadillac Warranty
- Bumper-to-Bumper: 4 years/50,000 miles
- Powertrain: 6 years/70,000 miles
Inspect the capless filler with a flashlight. Clean debris. If the code persists, your Cadillac dealer handles it at no cost.
The Verdict
A warranty repair under Cadillac's generous 4-year/50,000-mile coverage. Clean the capless filler, then let the dealer handle the rest.