Fault Codes/Cummins/103Cummins103UnclassifiedGeneralWhat This Code MeansGenset shutdownPossible Causes•Speed bias circuit output is out of range (OOR), high or lowRelated Cummins Fault Codes10611510213583141821478115077153Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 103 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 103GET THE ANSWERFree account required — we'll bring your question with you.