![](https://blog.obdtools.net/wp-content/uploads/2018/02/xhorse-vvdi-key-tool-update-error-400-22-1-326x245.jpg)
VVDI Key Tool Upgrade failed: Error Code (400) (20)
Tech support from obdtools.net: Xhorse VVDI Key Tool has Error Code (400) Upgrade failed! Error Code (20) Read internal error! VVDI Key Tool version: Software version: 2.0.6 Hardware version: 1.1 […]