Fault Codes/Discovery Energy, LLC (Rehlko)/CO-3Discovery Energy, LLC (Rehlko)CO-3UnclassifiedGeneralWhat This Code MeansGenerator set shuts down on a faultPossible Causes•Incorrect CO parameter settingSuggested Actions1Set CO parameter to 0 (zero) or 1 as shown in the model parameter tablesRelated Discovery Energy, LLC (Rehlko) Fault CodesCO-6D12ALRTD133217 5D151695 18E01270 6E3EMERGENCY STOPENGINE STABrowse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for CO-3 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about CO-3GET THE ANSWERFree account required — we'll bring your question with you.