DTC P0643 is set when the voltage above 5.75V - maximum voltage of sensor power supply from ECM is detected. This code is due to the short to battery in sensor power circuit or the voltage problem inside of ECM.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Electrical check | 1. Sensor power supply A circuit 2. ECM component |
Enable Conditions |
•
Battery 11V ~ 16V | |
Threshold Value |
•
5V-voltage > 5.75V | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
2 driving cycles |
