P0456 Small Leak - Evaporative Ctl Emission System

[147_Grain]

P0456 - "Very Small Leak in Evaporative Control Emission System".

Application is a well maintained 2005 Dodge Neon SXT with 117K miles.

Having a challenging time finding the "Very Small Leak in Evaporative Control Emission System". Fuel cap was replaced at 112K and visual inspection hasn't found anything - yet.

Any ideas?

Thank-you in advance of your assistance!

 

[salv]

make sure that the fuel cap is an oem unit to ensure tight fit. make sure the mouth of the fuel filler neck is smooth and free of corrosion. if it isn't sand it and wipe it down with some pb blaster.

 

[NHGUY]

Rusty filler neck? Cracked vapor hose/elbow (very common)?