SOME VEHICLES MAY EXPERIENCE AN ENGINE THAT RUNS ROUGH AND THE CHECK ENGINE LIGHT ON WITH DTCS P0201 AND P0204 OR P0202 AND P0203.NOTE:ENGINE MISFIRE RELATED DTCS (P0301, P0302, P0303, P0304) ARE USUALLY STORED AT THE SAME TIME.P0201:00: FUEL INJECTOR CIRCUIT/OPEN CYLINDER NO.1P0202:00: FUEL INJECTOR CIRCUIT/OPEN CYLINDER NO.2P0203:00: FUEL INJECTOR CIRCUIT/OPEN CYLINDER NO.3P0204:00: FUEL INJECTOR CIRCUIT/OPEN CYLINDER NO.4THIS CONCERN MAY BE CAUSED BY AN INTERNAL FAILURE OF THE PCM (DENSO PRODUCED ONLY). TO CORRECT THE CONCERN, THE PCM INTERNAL FAILURE HAS BEEN ELIMINATED.