A very small leak has been detected in the EVAP system.
Informational only. Consult a qualified mechanic.
Replace gas cap. If code persists, have EVAP system smoke tested.
The P0456 OBD-II diagnostic trouble code (DTC) indicates: evap system very small leak. This is a low-severity powertrain code that your vehicle's onboard diagnostics system triggers when a very small leak has been detected in the evap system. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
Track codes on your vehicle — sign up free
Log OBD-II codes, get maintenance reminders, and keep your complete service history.