Fault Codes/Cummins/418Cummins418UnclassifiedGeneralWhat This Code MeansWater in fuel indicationPossible Causes•The engine controller has sensed a fault condition and is broadcasting the fault message•Water detected in fuelSuggested Actions1Consult the engine service manualRelated Cummins Fault Codes425426379689286911285912254913252914Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 418 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 418GET THE ANSWERFree account required — we'll bring your question with you.