The P0440 Trail on Your 2024 Nissan Sentra
A P0440 code on your 2024 Nissan Sentra points to the EVAP system. The Sentra's 2.0L four-cylinder engine uses a straightforward EVAP setup with Nissan-specific components. On a newer vehicle, the cause is usually simple to identify.
Symptoms
- Check engine light on
- Faint fuel smell
- Slight MPG drop
- Fueling difficulties
- Emissions failure
Your Sentra drives normally. P0440 does not affect the engine or CVT.
Likely Causes
- Gas Cap — Most common. Estimated repair: $5–$20.
- Purge Volume Control Valve — Nissan's PVCV can fail. Estimated repair: $75–$190.
- Canister Vent Control Valve — Controls airflow into the canister. Estimated repair: $80–$210.
- Leak Detection Pump — Nissan's dedicated EVAP test pump. Estimated repair: $140–$330.
- Factory Issue — Assembly or software calibration. Estimated repair: $0 (warranty).
Diagnostic Steps
- Check gas cap
- Scan for EVAP codes
- Test valves and pump
- Smoke test if needed
- Check for Nissan TSBs
Costs
$0 under warranty. Your 2024 Sentra is fully covered. Visit your Nissan dealer.
Concern Level
Very low. P0440 is minor and safe to drive with.
Dealer Recommended
Use your warranty for free repair.