The P0440 Investigation: Your 2024 Nissan Altima
When your 2024 Nissan Altima triggers a P0440 code, the evidence points to a malfunction in the EVAP (Evaporative Emission Control) system. The Altima's 2.5L four-cylinder engine uses a comprehensive EVAP system with Nissan-specific components. On a newer vehicle, the investigation is often straightforward. Let's examine the clues.
Symptoms
- Check engine light on
- Faint fuel odor near the car
- Slight decrease in fuel economy
- Difficulty fueling at the gas station
- Failed emissions inspection
Your Altima will drive perfectly normally. The CVT, engine, and all other systems are unaffected by P0440.
Most Likely Causes for the 2024 Altima
- Gas Cap Issue — A loose or improperly seated gas cap is the most common trigger. Always check this first. Estimated repair: $5–$25.
- EVAP Canister Purge Volume Control Valve — Nissan's purge valve (also called the purge volume control valve or PVCV) is a common failure on Altimas. It controls vapor flow from the canister to the intake. Estimated repair: $80–$200.
- EVAP Canister Vent Control Valve — Located near the charcoal canister, this Nissan-specific valve controls airflow into the EVAP system. Estimated repair: $90–$220.
- EVAP Leak Detection Pump — Nissan uses a dedicated leak detection pump to test the EVAP system's integrity. If the pump fails, P0440 is a common result. Estimated repair: $150–$350.
- Charcoal Canister — Canister saturation from overfilling the fuel tank. Estimated repair: $200–$480.
Diagnostic Steps
- Tighten or replace gas cap, clear code, drive for two days
- Scan for companion codes (P0441, P0442, P0443, P0446, P0455, P0456)
- Test the purge volume control valve and vent control valve
- Verify EVAP leak detection pump operation
- Smoke test the EVAP system for physical leaks
Repair Costs
- Gas cap: $5–$25
- Purge volume control valve: $80–$200
- Vent control valve: $90–$220
- Leak detection pump: $150–$350
- Charcoal canister: $200–$480
- Diagnostic: $80–$150
Warranty: Your 2024 Altima is covered under Nissan's 3-year/36,000-mile bumper-to-bumper warranty. Visit your dealer for a free repair.
Can I Drive With P0440?
Yes. P0440 is completely safe to drive with. No performance or safety concerns.
Dealer Recommended
For a 2024 model under warranty, take it to the Nissan dealer for free diagnosis and repair.