KIA: SERVICE ACTION: PCM UPGRADE DTC P0304 CYLINDER MIS FIRE WITH 2.0L ENGINE AND A/T LOGIC (SA0250 SOME VEHICLES MAY EXPERIENCE A MIL ON WITH DTC P0304 STORED IN MEMORY. IN MOST CASES THE DTC IS SET ONLY DURING A COLD START AND NORMALLY THE CUSTOMER DOES NOT NOTICE ANY ENGINE STUMBLE, ROUGHNESS OR PERFORMANCE ISSUES. *PE