CAR OBD CODES

P0643 OBD Code Definition:
P0643 Sensor Reference Voltage A Circuit High
P0643 OBD Code Description:

OBD2 Code P0643 Definition:
The ECM has detected that the 5 volt reference voltage is too high Symptoms

Possible sumptoms of P0643
– Engine Light ON (or Service Engine Soon Warning Light) Possible Causes

Possible causes of P0643
– ECM Short circuit condition – Shorted sensor on 5 volt circuit – Failed ECM Possible Solutions

Note: The information on the P0643 error code is purely informative, if you need more useful information, please consult your technician.