Some 2017MY Santa Fe Sport (AN) vehicles may have the condition where the fuel filler cap seal may not provide proper sealing and trigger the Check Engine Light with the following DTC(s).
? P0442: Evaporative Emission System - Leak detected (Small Leak)
? P0456: Evaporative Emission System - Leak detected (Very Small Leak)
This bulletin provides the procedure to replace the fuel filler cap to correct this condition.