Fault Codes/Discovery Energy, LLC (Rehlko)/D11Discovery Energy, LLC (Rehlko)D11UnclassifiedFuelWhat This Code MeansAir/Fuel Module (AFM) shutdownRelated Discovery Energy, LLC (Rehlko) Fault CodesP0122P0123D02P01243464 14P02213464 7P0222P0223P0224P1134P1520Browse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for D11 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about D11GET THE ANSWERFree account required — we'll bring your question with you.