Ford P0642 OBD-II Trouble Code Definition: P0642 Sensor Voltage Circuit A Low Voltage P0642 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0642 Sensor Reference Voltage “A” Circuit Low What does the code mean? OBD-ii Code P0642 definition: The ECM has detected that the 5 volt reference voltage is too low Symptoms Sumptoms of OBD code P0642 […]