Tracking Down P0441 on Your 2018 Nissan Altima
A P0441 code on your 2018 Nissan Altima indicates incorrect purge flow in the EVAP system. The 2018 Altima — the final year of the 5th generation — offers a 2.5L four-cylinder or 3.5L V6. P0441 targets the purge circuit — the PVCV (Purge Volume Control Valve) and vacuum lines routing fuel vapors from the canister to the engine.
How the Code Sets
The ECM commands the PVCV open during driving and monitors fuel tank pressure. Nissan's active leak detection pump also tests system integrity. When purge flow deviates from calibration, P0441 stores. After 6+ years, component wear is the primary concern.
Primary Clues
- PVCV Failure (35% likelihood) — The top suspect. Six-plus years of operation degrades the internal valve. Part: $35–$80. Labor: $55–$115.
- Vacuum Line Deterioration (25% likelihood) — Years of heat and vibration crack rubber hoses. The 3.5L V6 generates more heat. Inspect all purge circuit lines. Repair: $12–$40. Labor: $30–$80.
- Canister Close Valve (CCV) (15% likelihood) — Age-related wear on Nissan's vent valve. Part: $30–$85. Labor: $80–$165.
- Leak Detection Pump (10% likelihood) — Years of cycling wear out the pump. Part: $55–$130. Labor: $70–$140.
- Charcoal Canister (10% likelihood) — Years of fuel overfilling saturate the canister. Part: $110–$280. Labor: $85–$175.
- Fuel Tank Pressure Sensor (5% likelihood) — Age-related drift. Part: $35–$85. Labor: $55–$110.
5th Generation Notes
The 2018 is the last year of the L33 platform Altima. This generation's PVCV and CCV are well-documented failure points. The leak detection pump is unique to Nissan and adds a component that other manufacturers don't have — it's worth testing during diagnosis.
Warranty & Emissions
Nissan's basic and powertrain warranties have expired for a 2018 model. The federal emissions warranty (8 years/80,000 miles) may still cover specific components — this is your last window for potential coverage. Check with your Nissan dealer before paying out of pocket.
DIY Repair
The PVCV is accessible in the engine bay. The CCV and leak detection pump require access to the underside/rear. A basic OBD-II scanner can read codes but Nissan's CONSULT system is needed for full EVAP actuator testing. PVCV replacement is a moderate DIY job.
Repair Costs
PVCV: $90–$195. Vacuum lines: $42–$120. CCV: $110–$250. Leak detection pump: $125–$270. Charcoal canister: $195–$455.