Solution to Xhorse VVDI2 not connected by OBD2 error

Offer DIY solution to the error that Xhorse VVDI2 is not connected by OBD2.

Thanks to jodge (DK Veteran).



VVDI2 is no longer connected by OBD2, it has been short to negative.

This component was burned (make smoke), I took it and at least UDS protocol is working, I did not test in Kline


jodge’s solution:


Please replace A2SHB component.


Part Number : A2SHB

Function : N-Channel 1.25-W, 2.5-V MOSFET

Package : SOT23 Type

Manufacturers : Vishay, NXP

Image :



N-channel enhancement mode field-effect transistor in a plastic package using TrenchMOS technology.




  1. TrenchMOS™ technology
    2. Very fast switching
    3. Logic level compatible
    4. Subminiature surface mount package.


  1. Battery management
    2. High speed switch
    3. Low power DC to DC converter.


You try it at your own lucky.


Xhorse VVDI2 tech support is always available at