Lexia3 = Dedicated OBD II reader and SW for Berlingos. Usually comes packaged with the SW for Peugeots, too.
It's really a 'for authorized mechanics' package, but if you search The Bay of E, or google around a bit you can usually find a Chinese-made copy with pirated SW.
It does more than just read out fault codes, though.
Mine came from an eshop in england...
A couple of videos I made;
(.MOV video recorded with an action-cam. It's supposed to show the screen of my netBook running LEXIA3 as I do a couple of starts.)
(Also LEXIA3, this time showing info about injectors during a start)
Not only can you see how the engine performs, but there are test functions, too.
One function fires the injectors (you can actually hear the injectors click when the engine isn't running), start and stop fuel pump, all kinds of stuff. Pretty neat if it wasn't for the horrid interface.
I recommend NOT to install it on your main computer as it adds lots of background stuff that throws up error after error on startup.