The Lemon IndexThere's a very small leak in the fuel vapor system.
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
Gas cap seal. Then: tiny crack in an EVAP hose; leaking purge or vent valve.
Owners named P0456 in 160 complaints to the U.S. government, most often on the Ford Focus.
Models that report it most
Complaints that name P0456, by model. Raw counts, not a failure rate: popular models get more complaints. Tap a model for its years, mileage and what owners say fixed it.
P0456 by model: P0456 Ford Focus (26) · P0456 Ford Escape (10)
Years owners report it on most: 2018 Ford Focus · 2013 Ford Focus · 2012 Ford Focus · 2010 Ford Fusion · 2013 Chrysler Town & Country · 2011 Ford Fusion
The details
What P0456 means
There's a very small leak in the fuel vapor system. The car drives normally.
Can I drive with P0456?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
21% of the owner complaints that name P0456 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0456
- Gas cap seal
- Tiny crack in an EVAP hose
- Leaking purge or vent valve
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 21% of complaints
- Fuel smell or fuel leak: 11% of complaints
- Loses power or goes into limp mode: 11% of complaints
- Shakes, runs rough or misfires: 11% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0456 most
2018 Ford Focus (10), 2013 Ford Focus (5), 2012 Ford Focus (5), 2010 Ford Fusion (3), 2013 Chrysler Town & Country (3), 2011 Ford Fusion (3).
Related codes
P0455 P0457 P0452 P0451 P0460 P0461 P0462 P0449
Quick answers
What does P0456 mean?
Evaporative Emission System Leak Detected (Very Small Leak). There's a very small leak in the fuel vapor system. The car drives normally.
Can I drive with P0456?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
What causes P0456?
Gas cap seal; Tiny crack in an EVAP hose; Leaking purge or vent valve.
Counts: NHTSA owner complaints whose text names P0456. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.