# Diagnostics

Vehicle Spy allows diagnostic messages to be quickly built into diagnostic jobs using built-in diagnostic services. Vehicle Spy can also transmit diagnostic jobs and decode their responses.\
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Diagnostic jobs are built on the Setup Diagnostics screen (Spy Networks->[Diagnostics Setup](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-spy-networks/diagnostics/diagnostics-setup.md)). After a job is built, it can be launched directly from the screen by clicking the Launch button.\
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If a job is launched from the setup screen, Vehicle Spy will automatically switch to the Diagnostics screen to show you the decoded results (Figure 1). The Diagnostics screen (Spy Networks->[Diagnostics](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-spy-networks/diagnostics/diagnostics-view.md)) can also be accessed with the mouse to launch jobs and see the results.

![Figure 1: The Diagnostics screen where jobs are launched and their results can be viewed.](/files/2vAyrklMP4OJxXQk3phJ)


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