SERVICE ACTION: HESITATION, LACK OF POWER AND/OR CHECK ENGINE LIGHT ON (SA227) - THIS BULLETIN PROVIDES THE PROCEDURE TO ADD A FUEL ADDITIVE TO SOME 2016MY FORTE (YD) VEHICLES, PRODUCED FROM APRIL 1, 2015 THROUGH DECEMBER 15, 2015, WHICH MAY EXPERIENCE HESITATION, LACK OF POWER AND/OR A CHECK ENGINE LIGHT ON WITH POSSIBLE MIS-FIRE CODES DUE TO A TEMPORARY CONTAMINATION IN THE FUEL LINE. KIA IS REQUESTING THE COMPLETION OF THIS SERVICE ACTION ON ALL AFFECTED VEHICLES IN DEALER STOCK, PRIOR TO DELIVERY.