Fault Codes/Cummins/99Cummins99UnclassifiedFuelWhat This Code MeansFUEL LEVEL LOW warning displayedPossible Causes•Fuel level dropped below the low fuel level trip point•Fuel level has reached the shutdown trip pointSuggested Actions1Refill fuel before shutdown occursRelated Cummins Fault Codes24422243625425365ALARM ID 33BASINCODE 12CODE 13CODE 14CODE 15F4Browse all Cummins fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 99 on your specific Cummins unit — cited to the OEM manual, not a forum guess.Your question about 99GET THE ANSWERFree account required — we'll bring your question with you.