P0440 on Your 2024 Nissan Titan: Following the Evidence
A P0440 code on your 2024 Nissan Titan means the EVAP system has detected a malfunction. The Titan's 5.6L Endurance V8 and 9-speed automatic are paired with an EVAP system that, while generally reliable, can still develop issues. Under warranty, this should be resolved quickly and at no cost.
Symptoms
- Check engine light on
- Possible fuel smell
- Slight MPG decrease
- Fueling difficulties
- Emissions test failure
Your Titan's V8, transmission, 4WD, and full towing capability are completely unaffected.
Probable Causes
- Gas Cap — Most common trigger. Estimated repair: $0–$25 (warranty).
- Purge Volume Control Valve — 5.6L V8 known issue. Estimated repair: $0–$220 (warranty).
- Canister Vent Control Valve — Common Nissan failure. Estimated repair: $0–$235 (warranty).
- Leak Detection Pump — Self-test component. Estimated repair: $0–$375 (warranty).
- Software Update — Possible calibration refinement. Estimated repair: $0 (warranty).
What to Do
Take your 2024 Titan to the Nissan dealer. All repairs are covered under the 3-year/36,000-mile bumper-to-bumper warranty.
Cost
$0 under warranty.
Concern Level
Very low. P0440 is a minor emissions code. Completely safe to drive and tow.
Dealer Is the Way
Free warranty repair. Don't DIY a new truck under warranty.