not sure what to say if it worked now it don't work , do you have any other regular obd2 scanner to test see if it reads if the obd2 plug is good on car , if that is good than you will have to see what is wrong with modis i can give you snap on contact for scanner support im reading this in modis manual
The following conditions cause the Scanner™ Plug-in to display a “No Communication” message:
The Scanner™ Plug-in is unable to establish a communication link with the vehicle.
You are using the incorrect Personality Key with the test adapter.
You selected a system for testing that the vehicle is not equipped with (for example, ABS).
There is a loose connection.
There is a blown vehicle fuse.
There is a wiring fault on the vehicle.
Incorrect vehicle identification was entered
Occasionally, you may be unable to communicate with a particular vehicle because it is an older
model or for some other reason it is not covered in the current database. Legacy Software also
provides an alternate method of connecting to a vehicle when communication problems are
encountered. The Legacy Software runs your scan tool using an obsolete version of the operating
The Legacy Software option is available from the Utilities button on the MODIS™ main menu
(Figure A-2). Scroll through the dropdown menus, then press
to load the software.