Ford P0043 OBD-II Trouble Code Definition: P0043 HO2S Heater Control Circuit Low Bank 1 Sensor 3 P0043 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0043 HO2S Heater Control Circuit Low What does the code mean? OBD-ii Code P0043 definition: Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 […]