To be honest most code readers and diagnostic gear is extremely expensive, a code reader for £7 can only be one thing in my opinion... ****, you could possibly risk scrambling your ECU and doing more damage than good. Why did you need one, is your MIL on?
The best and cheapest code reader I know of is the basic Blue-Point code reader there is a second hand one in eBay at the moment Item no: 161096969019
I would snap this up if I had the money
