My smog check showed a very small fuel leak, what does this mean?

Question

P0456 EVAP control system leak was detected.

Answer 1

P0456 Evaporative emission control system (very small leak)

When whole purpose for the CK ENG LT program is to control pollution , and harmful emission being emitted into the atmosphere, raw fuel fume being emitted into the atmosphere is a pollution where the evap system is to control monitor the system, P0456, this type of it is usually a fuel cap whether not properly secured, or the seal of the fuel cap worn.