Nissan Error Code P1440: How to Fix It

Q: Can I drive with P1440 error code?

Yes, you can drive safely with P1440 as it indicates a small EVAP leak that doesn't affect engine operation. However, you should address it promptly to maintain emissions compliance and prevent potential fuel economy issues.

Q: How much does it cost to fix P1440?

Repair costs vary widely depending on the cause. A new gas cap costs $15-40, EVAP hoses run $10-30, and a purge valve replacement costs $50-150 in parts. Professional diagnosis typically costs $100-150 if you can't locate the issue yourself.

Q: Will P1440 cause my car to fail emissions testing?

Yes, P1440 will likely cause your vehicle to fail emissions testing since it indicates a problem with the EVAP system. The code must be resolved and the system must pass its readiness monitors before passing emissions tests.

Q: How long does it take for P1440 to come back after clearing?

If the underlying problem isn't fixed, P1440 typically returns within 50-100 miles of driving. The EVAP system runs self-tests under specific conditions, so the code may not appear immediately after clearing.

Q: What causes P1440 besides a loose gas cap?

Common causes include cracked EVAP hoses, faulty purge valve, damaged charcoal canister, loose hose connections, or a malfunctioning vent valve. Heat and age typically cause rubber components to crack and create small leaks.

Abstract

The P1440 error code in your Nissan indicates a small leak has been detected in the Evaporative Emission Control (EVAP) system. This system captures fuel vapors from your gas tank and prevents them from escaping into the atmosphere. While not immediately dangerous, this issue should be addressed to maintain proper emissions control and prevent potential fuel economy problems.