Fault Codes/Cummins/2729Cummins2729UnclassifiedGeneralWhat This Code Means2729Possible Causes•Intermittent data link between the I/O module and the PCC controlRelated Cummins Fault Codes273128162696288426782888267728912676289326622896Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 2729 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 2729GET THE ANSWERFree account required — we'll bring your question with you.