Fault Codes/Cummins/226 THRU 233Cummins226 THRU 233UnclassifiedGeneralWhat This Code MeansBase I/O Module FaultPossible Causes•Optional customer selectionRelated Cummins Fault Codes234236225238224239223245222252221254Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 226 THRU 233 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 226 THRU 233GET THE ANSWERFree account required — we'll bring your question with you.