Fault Codes/Discovery Energy, LLC (Rehlko)/P0643Discovery Energy, LLC (Rehlko)P0643WarningGeneralWhat This Code MeansP0643Possible Causes•Problem with 5 V sensor power supply circuit. Power supply is above 5.4 V.Suggested Actions1Check electrical connection at ECM for sensor power supply circuit.2Check for a short circuit to battery voltage or open circuit in sensor ground wire.3Check for shorts by disconnecting the TMAP and TP sensors.Related Discovery Energy, LLC (Rehlko) Fault CodesP0653P0657P0642P0658P0638P0659P0606P0686P0605P0687P0604P1518 3464 13Browse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for P0643 on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about P0643GET THE ANSWERFree account required — we'll bring your question with you.