Fault Codes/Discovery Energy, LLC (Rehlko)/P0031Discovery Energy, LLC (Rehlko)P0031WarningGeneralWhat This Code MeansP0031Possible Causes•Problem with the HEGO sensor or leads.Suggested Actions1Troubleshoot the HEGO sensor for bad leads.2Refer to Heated Exhaust Gas Oxygen (HEGO) Sensor Troubleshooting section.3Replace the HEGO sensor.4Refer to the Heated Exhaust Gas Oxygen Sensor (HEGO) section.Related Discovery Energy, LLC (Rehlko) Fault CodesP0032P050CP0007P0068P0006P01023217 5P01031695 18P01071270 6P0108Browse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for P0031 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about P0031GET THE ANSWERFree account required — we'll bring your question with you.