I just want to give a tips for my Volvo and iPhone friends!
I found a application called "Vol Fault Codes", it contains all fault codes to older Volvos with diagnostic box! I found it very good to always have descriptions to the codes in my pocket

Here is a direct link to itunes:
http://itunes.apple.com/us/app/vol-f...8131?mt=8&ls=1

If you know some similar application, please tell me

 

Thanks for sharing, this information is really useful as well as helpful. I am also using iPhone 4 which looks really nice. It is the version that I have been waiting for since the iPhone came out. While the design is cool and pleasing, I'm not sure it was actually unique as it looks very similar to an HP Slate device.