Fault Codes/Cummins/225Cummins225UnclassifiedGeneralWhat This Code MeansAnnunciator output configuration errorPossible Causes•Mismatch in the configuration of one of the annunciator relay outputsRelated Cummins Fault Codes226 THRU 233234224236223238222239221245220252Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 225 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 225GET THE ANSWERFree account required — we'll bring your question with you.