Fault Codes/Discovery Energy, LLC (Rehlko)/P0131Discovery Energy, LLC (Rehlko)P0131WarningElectricalWhat This Code MeansHEGO sensor Circuit Low Voltage (B1S1)Possible Causes•Problem with the HEGO sensor or leadsSuggested Actions1Troubleshoot the HEGO sensor for bad leads. Refer to the Heated Exhaust Gas Oxygen (HEGO) Sensor Troubleshooting section2Replace the HEGO sensor. Refer to the Heated Exhaust Gas Oxygen Sensor (HEGO) sectionRelated Discovery Energy, LLC (Rehlko) Fault CodesP0132P0561P0562P0652P0698P0699P0133P0129P0134P0128P0171Browse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for P0131 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about P0131GET THE ANSWERFree account required — we'll bring your question with you.