Fault Codes/Power Solutions International, Inc./DTC 604Power Solutions International, Inc.DTC 604UnclassifiedGeneralWhat This Code MeansMIL (Malfunction Indicator Light) ON; Engine shutdownPossible Causes•Faulty ECM•Faulty power and ground circuits to ECM•Faulty wiring to ECM•Intermittent fault•Internal microprocessor errorSuggested Actions1Allow the ECM to attempt to reset itself2Check all power and ground circuits to ECM3Clear the code using the DST (Diagnostic Service Tool)4Perform On-Board (OBD) System Check5Repair wiring to ECM and retest6Replace ECM with known good part and retestRelated Power Solutions International, Inc. Fault CodesDTC 687DTC 1112DTC 601DTC 1613DTC 342DTC 1628DTC 337DTC 1650DTC 336DTC 2111DTC 327DTC 3032Browse all Power Solutions International, Inc. fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for DTC 604 on your specific Power Solutions International, Inc. unit — cited to the OEM manual, not a forum guess.TRY IT FREE