My mrs car has just gone in for a diagnostic coz the engine light came on and I think it's around 40 quid, even though they do nowt other than plug the car in to get an engine fault code!
I've found some free software online and a USB cable to plug into the laptop. Is it really as simple as plugging one end into the car, the other USB end into the laptop, running the software on said laptop to get the fault codes from the car? Then punch the codes into google to get the fault?
If so I'm gonna buy a cable for the future just to get the codes in case it's an easy fix to mend meself.
Upshot is the Altea has codes for a faulty control fan and motorised manifold valve (which I've discovered is commonly known as a EGR valve) and I'm potentially looking at a £500 repair bill!!! Even though the car is running like a dream!!