Fault Codes/Cummins/31Cummins31UnclassifiedGeneralWhat This Code MeansImmediate genset shutdown; Battle Short mode suspendedPossible Causes•Engine exceeded normal operating speed (1725 RPM at 50 Hz or 2075 RPM at 60 Hz)•Engine has exceeded normal operating speed•OverspeedRelated Cummins Fault Codes384524461561147413751276Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 31 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 31GET THE ANSWERFree account required — we'll bring your question with you.