I have just purchased an ELM327 which is bluetooth & runs on my android Galaxy Note & gives plenty of viewing options! & I am also considering getting rid of my Scanguage which is plug in display guage which will also read & clear logged codes.
If you have an android buy an app called Torque BHP and an Elm27 Bluetooth OBDii transmitter (£13 ebay)
Now you have a dtc code reader,dozens of live gauges (even shows turbo boost on mine),track recorder,etc etc etc
If you havent got an android you can get one with txts/mins/daya for around 50p/mth after cashback (if I can find the comparison site again!
sorry, should have mentioned its 1999 - I could get the phone to "see" the adaptor, but while it would pair none of the programs I tried would sync with it. Probably does not work too well on the older cars.