Hi,

I am new to this Forum, don't know if this is the right way to contact you peeps but here goes.

I have a VW Golf TDI S W reg it has the classic power loss problem, it drives fine but is sluggish and will struggle upto around 70 mph and rarely go any further, uphill is a struggle and down hill it goes above this speed. I have a diagnostics tool on which the code p1556 code came up which as you may be aware is the neg deviation fault.
The problem is this points to a number of problem areas, some say it could be the exhaust manifold blocked with soot etc and will need taking out and cleaning. I tried to get to it at the weekend but didnt have the right tools, opened the EGR valve and cleaned itr and put it back, it had a bit of black oily soot in it. Can you advise please and tell me if the p1556 code could also come up if the MAF is faulty as it had a similar problem before on a different tdi and replacing the MAF sorted it.

would be great to get some ideas, thanks