Hi. Have a look on ebay you can pick up OBD II code readers for about £20 that should be ok with your car. 
Thanks for that Grimm, sounds a nice bit of kit. Unfortunately, my 'phones don't support "Apps" I still have the windup type.There is an App' for Android phones. It's called 'Torque'. It reads codes via the OBD with an adaptor lead as well as showing 0-60 times, etc.
Might be worth looking at.
Doesn't work on my I-Phone 3G though unfortunately.