P0456 FORD - EVAP System Leak Detected Gross Leak/No Flow
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Evaporative Emission (EVAP) canister or fuel tank leaks
- Evaporative Emission (EVAP) system hose leaking
- Fuel tank leaking
User Submitted Video
- Possible a noticeable fuel odor caused by the release of fuel vapors
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 EVAP canister purge volume control solenoid valve under the following vacuum test condition.
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.
P0456 1998 FORD F150
P0456 1999 FORD F150
P0456 2000 FORD F150
P0456 2001 FORD F150
P0456 2002 FORD F150
P0456 2003 FORD F150
P0456 2006 FORD FUSION
P0456 2007 FORD FUSION
P0456 2008 FORD FUSION
P0456 2009 FORD FUSION
P0456 2010 FORD FUSION
P0456 2011 FORD FUSION
P0456 2012 FORD FUSION
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