There are a couple of devices that do this. I use a hard wired connection, plugs into the ODB-II port on one end and the laptops USB port on the other. You can see it at scantool.net, but I bought from amazon. You can also use Bluetooth, but I haven;t done that.
One you have the wire you'll need software to read/report on the data. I use ODBWIZ that came with my cable, there is also free software.
To find these goto amazon and look for odb-II. MAybe something like this would work for you. http://www.amazon.com/ScanTool-423001-ElmScan-Diagnostic-Software/dp/B002PYBZJO/ref=sr_1_5?ie=UTF8&qid=1355699518&sr=8-5&keywords=odb-ii+bluetooth