Fault Codes/Cummins/38Cummins38UnclassifiedGeneralWhat This Code MeansGenset shutdown; Field AVR Duty Cycle at maximum continuously for 15 secondsPossible Causes•Field AVR Duty Cycle at maximum continuously for 15 secondsRelated Cummins Fault Codes454631612474157514761377Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 38 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 38GET THE ANSWERFree account required — we'll bring your question with you.