2011 Nissan P0440: What It Means & Is It Safe to Drive?
P0440 on the 2011 Nissan: Evaporative Emission System Control System Malfunction. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
A general fault in the EVAP system—could be a leak, stuck valve, or sensor issue.
Common causes on the 2011 Nissan
- Gas cap loose or faulty
- Purge or vent valve stuck
- Charcoal canister or hose leak
Symptoms
- Check Engine Light
Typical fixes
- Replace gas cap
- Test purge/vent valves
- Smoke test EVAP system
Repair cost range
For a 2011 Nissan, repairs for P0440 typically fall between $20 and $400, depending on the root cause and labor rates in your area.
Known issues on Nissan
Nissan P0440 typically points to the EVAP canister vent valve, mounted near the fuel tank and prone to failure from debris and moisture. Replace the vent valve before smoke testing the full system.
Most commonly affected models
Altima 2002–2006Pathfinder VQ35 2001–2004Frontier 2001–2006