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Is there any application with which I could do car diagnostics over OBDI, OBDII etc. ?

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    Did you try searching the software center? I typed 'OBD' and have four results already. (Don't mis-type and search for ODB, you don't want him working on your car anyway)
    – Tom Brossman
    Sep 9, 2012 at 12:41
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    In 12.04 I see only two packages, obdgpslogger and scantool. Development of the latter was discontinued in 2009. According to documentation, obdgpslogger supports OBDII over elm327-compatible devices, but I have no clue what that means in practice. Would it work for you?
    – taneli
    Sep 15, 2012 at 14:31

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"Theoretically" yes. There are some videos and tutorials such as this one (notice several comments noting problems of compatibility). Some have succeeded getting the right hardware to work. I had tried this with a cheaper device from Amazon (on two... no, three? versions of Linux), with no useful response. This may be defective device, or it may be that the vehicles I try had a different protocol (it turns out OBDII is actually many different signal protocols, which you may be able to look up or view by pinout). It may be better to buy a dedicated device for OBD reading.

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