Fault Codes/Cummins/E125CumminsE125UnclassifiedGeneralWhat This Code MeansEquipment shutdownPossible Causes•Low coolant levelRelated Cummins Fault CodesE153FAIL-TO-SYNCHRONIZE WARNINGE089H268DS8 (RED)H389DS7 (RED)H669DS6 (YELLOW)H706D041L028Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for E125 on your specific Cummins unit — cited to the OEM manual, not a forum guess.TRY IT FREE