Got my cheappo tech2 this morning, plugged it into the wifes old laptop serial port, and the fault said 'Front passenger seat airbag actuation' This would probably be due to the little plug under the seat - the plug had come off somehow and wires were hanging naked and I presume earthed together - lucky my seats dont have airbags or I imagine the bag would have deployed, but the cheapo tech2 reset it perfectly.
On the plus side aswell, I checked the engine for codes, and 'code 57 - code unknown' came up but reset fine, took it out for a 30 mile drive and checked again, but not a single fault now

Not bad for £30 im well happy with it, and the software is english

It doesnt have the ability to check solenoid operation or engine temp etc, but it does tell you the faults in text rather than numbers - I unplugged the EGR while it was running and it immediatly came up with 'EGR fail'. So for just clearing warning lights and finding faults, its a diamond

John