Subaru Error Code P1420: How to Fix It

Q: Can I drive with Subaru error code P1420?

Yes, you can drive with P1420 as it's not an immediate safety concern. However, you may experience slightly reduced fuel economy and the vehicle may not pass emissions testing. Address the issue promptly to prevent potential damage to other EVAP system components.

Q: How much does it cost to fix P1420 on a Subaru?

Repair costs vary depending on the root cause. A loose gas cap costs nothing to fix, while a faulty fuel tank pressure sensor typically ranges from $150-$300 including labor. More complex EVAP system repairs can cost $300-$600 at a shop.

Q: What causes Subaru P1420 error code?

Common causes include a loose or damaged gas cap, faulty fuel tank pressure sensor, cracked EVAP vacuum lines, or a malfunctioning EVAP canister. Environmental factors like extreme temperature changes can also trigger this code temporarily.

Q: Will P1420 cause my Subaru to fail inspection?

Yes, P1420 will likely cause your vehicle to fail emissions testing in states that require it. The code indicates an EVAP system malfunction, which is monitored as part of emissions compliance. The issue must be resolved and the code cleared before passing inspection.

Q: How do I prevent P1420 from coming back?

Ensure your gas cap is always tightened properly after fueling, avoid overfilling the tank, and have your EVAP system inspected during regular maintenance. Replace vacuum lines before they crack and keep fuel tank sensors clean to prevent recurring issues.

Abstract

Subaru error code P1420 indicates a problem with your vehicle's fuel tank pressure control system 2, which is part of the evaporative emissions (EVAP) system. This code typically appears when there's an issue with pressure sensors or vacuum lines that monitor fuel tank vapors. While not immediately dangerous, this error should be addressed to maintain proper emissions control and prevent potential fuel system issues.