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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 '12 at 12:41
+1 @Tom Brossman nice – matt davis Sep 9 '12 at 16:28
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 '12 at 14:31
Thanks, it will work. – Xamidovic Apr 8 '13 at 9:26
up vote 2 down vote accepted

"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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