[kota_5spd]

anyone know what code p0456 is on my 02 4.7

 

[Geoguy]

Small leak detected in the evaporative system.

Check gas cap or cracked hoses.

 

[4.7blaqdak]

anyone know what code p0456 is on my 02 4.7

Its really nothing to worry about just a annoyance with the check engine light on all the time.

 

[Y2KOTA]

Could be a small leak with the gas cap. Check the seal.

 

[linelock]

For me it was a cracked hose under the fuse box in the engine bay. Trimming off the cracked end of the hose fixed it.

 

[FSTDANGO3]

Also look By the Charcoal Canister.
Steve