Fault Codes/Discovery Energy, LLC (Rehlko)/P0509Discovery Energy, LLC (Rehlko)P0509WarningGeneralWhat This Code MeansP0509Possible Causes•Problem with the TP sensor in the throttle body or the leads.Suggested Actions1Troubleshoot the TP sensor leads. Refer to the Throttle Position (TP) Sensor Troubleshooting section.2Replace the throttle body. Refer to the Air - Fuel Mixer, Adapter, and Throttle Body Assembly section.Related Discovery Energy, LLC (Rehlko) Fault CodesP0563P0603P0508P0604P0335P0605P0172P0606P0171P0638P0121P0642Browse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for P0509 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about P0509GET THE ANSWERFree account required — we'll bring your question with you.