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GDI – Troubleshooting 13A-47 Code No. P0301 No. 1 cylinder misfire detected Code No. P0302 No. 2 cylinder misfire detected Code No. P0303 No. 3 cylinder misfire detected Code No. P0304 No. 4 cylinder misfire detected Probable cause Range of Check The engine speed is 500 – 4,500 r/min. While the engine is running except deceleration and sudden acceleration. Set Conditions The number of misfires exceeds a predetermined number per 200 engine or The number of misfires exceeds a predetermined number per 100 engine Malfunction of the ignition system Abnormal compression Malfunction of injector Malfunction of engine-ECU <M/T> Malfunction of engine-A/T-ECU <A/T> NG Check the harness wire between NG Replace NG Repair (2) NG OK Check the ignition failure sensor OK Check the harness wire between (3) NG OK Measure at ignition coil connectors Disconnect the connector and (1) The voltage between terminal 1 and earth (2) The voltage between terminal 3 and earth (3) The resistance between terminal 2 and earth Ω or less (1) NG Check the following connectors: NG Repair Check the ignition coil (Refer to Check the compression pressure. Repair Replace the engine-ECU <M/T> or OK Check the harness wire between the NG Repair OK NG NG Repair OK Replace NG Check the spark plugs. Check the trouble symptoms. OK Check the trouble symptoms. NG Replace the engine-ECU <M/T> or Check the following connectors: Check the following connector: OK |