I got a P0401 CEL at 51K miles on my 2007 Speed 3 the other day afterwards 2 or iii days of slow starts, where it would creepo a while before firing up. Guy at Advanced who read the code said EGR was chock-full, a $430 part from the dealer. Having owned a Protege 5, I knew what a stuck EGR was like, and how information technology tin can exist cleaned, but no how-to posted however for the Speed3 obviously. This is how I did it. Experience free to do information technology differently if you feel like information technology. This is probably not the only way to do information technology. It is just how I did it. Don't like it? Well, sorry I approximate. A 10 and 8mm deep and shallow socket, pliers, a 22mm wrench, apartment bract and Philips screwdrivers, Brake Parts cleaner, and some coolant will be needed. Oh,and a person with skinny fingers.

1st, it is non that hard to practise if you know a little bit on working on our cars already.

1st, where is the EGR. It is here:

Now what to do. To start, remove your OEM TMIC, battery and bombardment box. Also remove your turbo inlet pipe. loosen the acme on the coolant overflow tank. Put a rag in the turbo.
The EGR is the silver affair with the black plastic on summit. The pipe with two bolts coming out to the left of it is the EGR pipe.

There is a hose coming out of the back of the EGR, held on with a clamp. Pull the clamp back, disconnect the hose from the EGR, and let the coolant bleed. You will lose a quart or so, the overflow will be empty.

Remove the two bolts property the EGR on, and pull it out. Here is the EGR with the gasket on it. You cannot run across it, but there is carbon within, Nasty, but comes out piece of cake.

Now go up tho the front to the throttle body. You may make a mess if you have not already removed the coolant lines from the throttle body similar I did. If yous did not, do it at present.

Remove the throttle body past taking out the iv bolts:

Remove the two bolts holding the back office of the EGR piping on

Now utilize that 22mm wrench, loosen the commodities holding the front function of the EGR pipe now visible:

remove the pipage:

Admire the squeamish pile of carbon in front of the pipe. :damnit:

Feel gratuitous to blow compressed air through the pipe while it is removed. If clogged, use a coat hanger or something, and become out equally much every bit yous tin can. You might demand to take it to a mechanic to become it dipped in parts cleaner if you lot do not have it.

Skipped pics, but remove the iv screws holding the plastic top of the EGR valve. Don't strip or pause them. They are as a strong equally Dollar Tree trash bags.

There is a plunger. It is stuck. spray with brake cleaner on the holes, until clean, Scrape out carbon if needed.

Then reinstall everything. I ran a Seafoam handling, and now information technology runs bully, and CEL is gone.

The end.