Was over visiting the folks for a few days, took my mum out shopping and when we left the supermarket I noticed the engine light stayed on. The car itself appears to be running sweet. No hesitation, runs just as well as it did before, emissions are free from black smoke or hints of oil. Last service was done in Jan at 152k (according to the log book) and it's on 157k now. I honestly can't fault the engine... I got it home without getting the revs over 2500rpm so I guess I've done about 20 miles with it on... probably less certainly not higher. The only thing I've done recently is use some Redex in the fuel system which has cleared up some black smoke when accelerating over 3200rpm at WOT. Since using 2 treatments of redex that has cleared up too. I've ordered one of these so I can at least pull the codes. I've been wanting to get one for a while anyway, and it will probably cost me more to take it to a garage and get it plugged in. I'll check the codes and see what's flagged... and clear them to see if it comes back... then I'll replace whatever part it suggests or clean it out. I don't have a laptop, just several desktops as I wanted to get a wireless one I could leave plugged in. But I prefer my gaming rig, and my media server to a laptop. I've got an old tablet from 2013 and a new phone both on android (4.2 and 5.0.2 respectively). At this point... I'm completely in the dark until it arrives later this week... but any and all suggestions of common issues to the 2.2 CTDi welcome.