[olopezm]

Originally Posted by kafkacell

Here is what I ment when I said that I knew those codes were about to appear.

P0401 EGR flow lower than expected
One month ago I broke one metal connector, and did this job (poorly since code is there).

Well that might be the cause of the code, if that's the case you'll need to either solder it properly o replace the whole tube which is connected to the EGR valve on top of it and to the exhaust tube at the bottom (I don't think this is going to be a DIY job since the lower part of it gets rusted because of high temperatures and it is very likely that you'll need a torch to get it off). Before you do that make sure the green hose on top of the EGR valve is properly attached on both sides (the valve and the intake manifold). Here's a picture of another Ford vehicle to show which hose I'm talking about (thanks to the original poster for it).

Best regards,

Oscar.