OBD systems give the vehicle owner or repair technician access to the status of the various vehicle sub-systems.
The amount of diagnostic information available via OBD has varied widely since its introduction in the early 1980s versions of on-board vehicle computers.
Source: https://en.wikipedia.org/wiki/On-board_diagnostics
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The presented opinions are the views of the STEP AHEAD II project partnership and do not have to express the opinions of the EU.