Fault Codes/Cummins/2662Cummins2662UnclassifiedGeneralWhat This Code MeansOne or more acknowledged Engine Shutdown Faults are activePossible Causes•At Least One ACK:Mod Severe FaultSuggested Actions1See the troubleshooting for FC 6598 for additional information2Troubleshoot Engine Fault CodesRelated Cummins Fault Codes267726782661281426242815262328162545289223422893Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 2662 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 2662GET THE ANSWERFree account required — we'll bring your question with you.