(Solved) Vxdiag Vcx Nano GM E4491 E4423 Reprogramming Error

Tech support from professionals working for obdii365.com, especially for those with VXDIAG VCX NANO for GM diagnostic tools, having troubles in E4491 Reprogramming Error and E4423 Unknown Reprogramming Error.

The error message...

Tech info

E4491: Reprogramming Error! Check all connections and reset Programming Interface!

IMPORTANT: Do not replace the control module immediately!

First ensure the programming device (e.g. GM MDI) is updated with the latest software version and is properly connected to the service PC.

Then re-attempt the programming procedure.

If the failure persists, contact technical support for assistance.

E4423: Unknown reprogramming error

IMPORTANT: Do not replace the control unit immediately!

First ensure the programming device (e.g. MDI) is updated with the latest software version and is properly connected to the service PC.

Then re-attempt the programming procedure.

If the failure persists, contact technical support for assistance.

How to solve:

The  vxdiag vcx nano for gm diagnostic tool needs a firmware update and Pass Thru driver update.

The update can be done by Vxdiag professional technicians.

Note: For vxdiag vcx nano gm ecu programming, please refer to http://blog.obdii365.com/2017/03/30/vxdiag-vcx-nano-gm-program-buick-gl8-ecm-tcm-online/

Have fun!