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P0455 Evap System Large Leak Detected

Technical Description

Generic: Evaporative Emission Control System Leak Detected (no purge flow or large leak)
Chrysler: EVAP Large Leak Detected Conditions
Ford: EVAP System Leak (No Purge Flow or Large Leak) Conditions
GM (Chevrolet): EVAP System Leak Detected Conditions
Nissan: Evaporative emission (EVAP) canister purge system - gross leak

What does that mean?

This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model.

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected.

The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Related evaporative emission trouble codes include P0450, P0451, P0452, P0453, P0454, P0456, P0457, P0458, and P0459.


You likely won't notice any drivability problems.


A code p0455 most likely means one or more of the following has happened:

Possible Solutions

With a p0455, the most common repair is to:

Sources: B. Longo

See also: P0455.com

Other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0444 - P0445 - P0446 - P0447 - P0448 - P0449 - P0452 - P0453 - P0456

Related P0455 DTC Discussions

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