This error code, XSC 000639.12, indicates that the vehicle’s CAN Bus (500 kBd) is experiencing a high error rate. The control software is unable to process all CAN Bus messages received, which may be due to CAN Bus overload or…
- John Deere XSC codes
This error code, XSC 000628.12, indicates that the control software is currently being programmed. The system requires that the programming process be completed before this diagnostic trouble code can be addressed. Attempting to address the fault during programming can result…


