Fault Codes/Discovery Energy, LLC (Rehlko)/D02Discovery Energy, LLC (Rehlko)D02UnclassifiedFuelWhat This Code MeansLow fuel warningRelated Discovery Energy, LLC (Rehlko) Fault CodesD11P01223464 14P01233464 7P0124P0221P0222P0223P0224P1134P1520Browse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for D02 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about D02GET THE ANSWERFree account required — we'll bring your question with you.