Fault Codes/Cummins/72Cummins72UnclassifiedCoolingWhat This Code MeansGenset shutdown; Genset failed to sense rotation for two start attemptsPossible Causes•Fault with control system•Fault with speed sensing•Fault with starting systemRelated Cummins Fault Codes739649739821001101143144Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 72 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 72GET THE ANSWERFree account required — we'll bring your question with you.