Cracking the P0440 Code on Your 2022 Nissan Altima
Your 2022 Nissan Altima has set a P0440 code — a clue that leads directly to the EVAP system. The 2022 Altima, available with the 2.5L four-cylinder or 2.0L VC-Turbo, uses Nissan's well-established EVAP design with components that have known failure patterns. Here's our deduction.
Symptoms
- Check engine light illuminated
- Possible fuel smell
- Marginal fuel economy decrease
- Fueling issues at the pump
- Emissions test failure
Your Altima will drive, accelerate, and handle normally. P0440 does not affect the engine or CVT.
Suspects Ranked
- Gas Cap — Worn seal or loose cap. Estimated repair: $5–$25.
- Purge Volume Control Valve (PVCV) — Nissan's purge valve is a known failure point on the Altima. Estimated repair: $75–$195.
- Canister Vent Control Valve — Controls airflow into the EVAP canister. Estimated repair: $85–$215.
- Leak Detection Pump — Nissan's EVAP self-test pump can fail, preventing proper system monitoring. Estimated repair: $140–$340.
- Vapor Hose Leak — Rubber lines can crack with age and heat. Estimated repair: $40–$130.
Diagnostic Steps
- Replace gas cap, clear code, monitor
- Full EVAP code scan
- Test PVCV and vent control valve
- Verify leak detection pump function
- Smoke test for physical leaks
Costs
- Gas cap: $5–$25
- PVCV: $75–$195
- Vent control valve: $85–$215
- Leak detection pump: $140–$340
- Vapor hose: $40–$130
- Diagnostic: $80–$150
Safe to Drive?
Yes. No drivability concerns. P0440 is emissions-only.
DIY Potential
Gas cap is easy. The purge valve on the 2.5L is accessible in the engine bay and a moderate DIY job. The vent valve and leak detection pump are near the fuel tank and require more effort.