DTC P0455: Evaporative Emission System-Leak Detected (Large Leak): General Description

WARNING: This page is about a different variant/trim than selected.

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and the Purge Control Solenoid Valve (PCSV) under the following vacuum test condition.

The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the Purge Control Solenoid Valve (PCSV). The Canister Close Valve (CCV) will then be closed to shut the EVAP purge line off. The Purge Control Solenoid Valve (PCSV) is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the Purge Control Solenoid Valve (PCSV) will be closed.