Engine code showing po442 - 2000 Hyundai Accent

P0442 = Evap. Emission Ctrl. System - Small Leak detected (1.0 mm) Most times this is merely a fuel cap which has not been completely tightened. However, the EVAP (Evaporative Emissions System) is quite complex and there are many possible causes other than a loose fuel cap. If you have an OBDII scanner, erase the code and inspect your fuel cap... make sure you 'click' the cap at least three times when you reinstall it. If the code returns, best solution is take it to a Hyundai Service Center (dealership), pay the diagnostic fee. They will tell you EXACTLY what the problem is and what's needed to fix it (parts, labor, tax, time-frame, etc.).