I have kia k3 1600 gdiThe cheack engine give code...

Dear Sir
Welcome, and thank you for trusting us
P0442  means  Evaporative Emission Control System Leak Detected
one or more of the following has happened:

1. A loose or improperly affixed gas cap
2. A non-conforming gas cap 
3. A small leak/hole in a fuel vapor hose/tube 
4. small leak in EVAP system
5. Faulty vent o-ring seal
6. Defectivevent valve
7. Defective purge valve
8. Defective leak detection pump

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Kind Regards
Engineer mohammad