Where was this last week when I needed it! I have a Toyota Tundra Truck and it was flashing an 00304 & 00156 code that I had no idea what it was. I knew it was running really bad though. So I took it down to my local AutoZone because they will diagnose engine codes for free and it turned out that it was the number 4 cylinder which was not “firing”. What I could have done instead was just hook up the OBDKey to my Diagnostic port on my Truck and just connect it via Bluetooth to any of my Windows Mobile Devices and I would have been told what the codes were sitting right in my driveway! This would have saved me from having to drive all the way into town with my truck that was firing on 7 out of 8 cylinders! Check out this video and see how it works:

The OBDKey is for all OBD-II / EOBD compliant vehicles and will run about £100 ($132 USD). The OBDKey comes with the software and diagnostic device you need to figure out what is wrong with your car and will also monitor other engine statistics as well. For more information, head on over to  OBDKey

(via: wmpoweruser.com)