Fault Codes/Discovery Energy, LLC (Rehlko)/P0561Discovery Energy, LLC (Rehlko)P0561WarningElectricalWhat This Code MeansSystem Voltage UnstablePossible Causes•Problem with charging system.•Problem with the charging system voltage varying excessively.Suggested Actions1Check the battery and the battery charging alternator for proper operation.2Replace the battery and alternator if needed. Refer to the Engine Service Manual .Related Discovery Energy, LLC (Rehlko) Fault CodesP0562P0652P0132P0698P0131P0699P0563P0524P0603P0523P0604Browse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for P0561 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about P0561GET THE ANSWERFree account required — we'll bring your question with you.