getting code po442

Make sure the gas cap is tight and the seal is good. Evaporative Emission system problems are difficult for anyone to diagnose/test and repair themselves at home. Some evaporative diagnosis requires a scan tool to bi-directionally control solenoids to seal off and open and test for leaks. Another useful tool is a machine that generates an inert gas/smoke that when the system is sealed off, if there are any leaks the smoke "show up" where they are. Also some faults can be intermittent and when the codes are erased the self test procedures your computer uses to test the system can take a week or two to self complete as a certain specific drive procedure has to be performed.

could also be simple hose leak. Look for small green cap on hose in engine compartment- usually on drivers side. inspect hoses from there to intake. If hoses good may want to replace purge valve (small motor unit near that green cap) This pulls vapors out of tank and pushes to intake. I'd do that before spending money on any service. Good luck!