Cheers. Yep, able to stop by any time (week night or weekend) if you have a moment. Much appreciated. Let me know when's best. I did take it in to the garage for the free diagnostic (think they were worrying a bit at not having resolved) & they said it had 'sooted over' and they cleared it and the warning light cleared. That was last Friday and guess what? It's come back on again today! They also said before that it might possibly be a faulty CPU. I still have my 2.5 V6 waiting to be scrapped but doubt any of the parts would be of use as this one is an ordinary 2.2?