Ford P0042 OBD-II Trouble Code Definition: P0042 HO2S Heater Control Circuit Bank 1 Sensor 3 P0042 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0042 HO2S Heater Control Circuit What does the code mean? OBD-ii Code P0042 definition: Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F […]