Fault Codes/Discovery Energy, LLC (Rehlko)/P1609Discovery Energy, LLC (Rehlko)P1609ErrorGeneralWhat This Code MeansCalibration/Firmware MismatchPossible Causes•ECM not flashed correctlySuggested Actions1Re-Flash or replace the ECMRelated Discovery Energy, LLC (Rehlko) Fault CodesP2100P2102P1519 3464 13P2103P1518 3464 13P2109P0687P2111P0686P2113P0659P2119Browse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for P1609 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about P1609GET THE ANSWERFree account required — we'll bring your question with you.