Fault Codes/Cummins/234Cummins234UnclassifiedGeneralWhat This Code MeansEngine speed high; Engine shutdownRelated Cummins Fault Codes91191200-04591300-04291400-0409150916917918Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 234 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 234GET THE ANSWERFree account required — we'll bring your question with you.