P0643 Ford

Ford P0643 OBD-II Trouble Code Definition:

P0643 Sensor Reference Voltage A Circuit High

P0643 Ford OBD-II Trouble CodeDescription:

OBD Trouble Code P0643
Sensor Reference Voltage “A” Circuit High
What does the code mean? OBD-ii Code P0643 definition:
The ECM has detected that the 5 volt reference voltage is too high
Symptoms Sumptoms of OBD code P0643
– Engine Light ON (or Service Engine Soon Warning Light)
Causes Causes of the OBD-II code P0643
– ECM Short circuit condition – Shorted sensor on 5 volt circuit – Failed ECM