P0455 on a Nissan

What is different about P0455 on a Nissan?

Corrosion from road salt exposure is a documented regional factor affecting Nissan's EVAP vent control valve specifically, beyond the causes seen more broadly across the industry.

What Nissan owners run into with P0455

Vent control valve corrosion in salt-belt regions: Owners and independent shops in regions with heavy winter road salt use have documented corrosion of the EVAP canister vent control valve on some Nissan models as a cause of P0455, an issue more regionally concentrated than universally common.

Standard gas cap and hose causes still apply broadly: Outside of salt-belt corrosion, the same universal causes, a loose or damaged gas cap and cracked hoses, remain the most common explanation for P0455 on Nissan vehicles generally.

What to check first on a Nissan

The order below narrows the generic P0455 list down to what is worth checking first on this make. It is a starting order, not a diagnosis: patterns are generation specific and a vehicle outside those generations may have none of them.

Check in this order

• Check that the gas cap is present, properly tightened, and its seal is intact
• Inspect the EVAP canister vent control valve for corrosion, especially in regions with heavy winter road salt use
• Inspect EVAP hoses for cracks or disconnection
• Check for any obviously disconnected EVAP hoses under the vehicle

The generic picture behind P0455

This code sets when the same sealed system pressure or vacuum test used for the small leak code instead finds a leak large enough to fall into the manufacturer's large leak category, typically equivalent to an opening roughly the size of a small tube or an unsealed cap rather than a pinhole. A large leak is usually something obvious once looked for.

Everything on the main P0455 page still applies here. This page narrows the cause list to the patterns documented on Nissan vehicles, it does not replace the underlying definition.

The generic version of this code

• P0455 on any vehicle