Fault Codes/Cummins/5187Cummins5187UnclassifiedGeneralWhat This Code MeansUtility failed to close warningPossible Causes•Transfer switch failed to close on utility sideRelated Cummins Fault Codes56696598518691153131100532977AMBER2964BATTERY OUT OF RANGE HIGH OR PRE-HIGH2945CRANK FAILBrowse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 5187 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 5187GET THE ANSWERFree account required — we'll bring your question with you.