Ford club

So following on, I managed to locate the EGR Valve based on part numbers and thorough Googling. Not much videos or anything available for this year, so I'm gonna say a few keywords for to attract any Googlers: Ford Focus Mk4 2018 2019 2020 Estate EcoBlue 1.5 Diesel EGR Exhaust Gas Recirculation OBD Code P049b Exhaust Gas Recirculation B Flow Insufficient Detected I tried to get tothe EGR valve (part no. JN1Q-9M425, around £50 good condition 'used' on eBay), but after taking off the air intake hose and looking in it didn't look anywhere near as nasty as I expected based on 'clogged' EGR valves. I'm thinking this down to Ford's design for this EGR seems to be a different to some others I've seen in pictures and videos - the valve gate is right on the boundary of the valve so blockages happen before it - in the EGR cooling hose/pipe (part no. JN1Q-9F467) which runs directly below the EGR valve and is covered in a cloth like cover.  Getting to that was a bit of a pain with all of the stuff in the way and for an amateur like me, removing as minimal as possible was the best option. I started by removing the jubilee clip for the air intake pipe, and disconnecting the 3 sensors on the EGR valve itself (circled in red in the pictures, 3 different types of attachment), one has a small sensor going into a hole in the casting which can be pulled out. I then loosened (not removed) the plastic frame surrounding the air intake where the wiring loom is attached to (5 big torx screws??), this gives a lot of room to work. I then removed the air intake assembly right from the filter box to the front vent by removing the two 2-part tapered plugs, and pulling the filter box out from it's rubber insulators after the lid (with delicate sensor, didn't remove) has been put aside.  At this point, my torx head wouldn't fit into the gap between the radiator and the 2 bolts holding the EGR valve onto the engine. Doesn't matter anyway as what I was interested in was the hose below it, the EGR cooling hose/pipe. This is attached to the exhuast cooler near the base of the engine (silver box) and the bottom of the EGR valve via a rhombus flange each with 2x 8mm hex head bolts on both. Once all of the stuff mentioned above has been taken out of the way, it is fairly easy to get a ratchet socket spanner (mine was a mini Halfords one, perfect for the job) in there to remove the bolts.  Be careful not to drop a bolt (or the socket) into the engine bay as if it's like mine and has got a bottom to it it's a bit hard to get back, it's a bit of a tricky setup and very limited room to work in.  Once the bolts are removed, slide the EGR hose out. It's not very flexible which does help to remember the orientation it goes in, but difficult to get out. On the bottom of this hose should be a mesh filter with clips (no part number, couldn't find it). Mine was absolutely blocked up with thick soot that I couldn't see through it. My filter was also on the exhaust cooler (wrong??), the air flow should go INTO the dome shape and be clipped onto the EGR hose. The EGR hose was absolutely clean through - no problems there and though I didn't check the underside of the EGR valve I would imagine it is the same. All of the crud got caught in that mesh filter which must have then thrown me the EML for 'EGR Flow Insufficient'.  I gave mine a spray with carb cleaner, let it sit for a few minutes, and blew it out with compressed air. Good as new. I also hoovered any loose stuff out of the exhaust cooler. Put it all back together again and hope the engine turns on. My EML was still on, even after warming up with a good drive. I reset the code with my machine and it hasn't yet come back on. I hope this was helpful for anyone who comes across this. Any questions or additional pictures please do not hesitate to ask and if I've said aything wrong - please correct me! First time doing anything like this.   I've tried to upload a picture of the mesh filter but for whatever reason it's not letting me so it's here https://i.imgur.com/ioWZG4D.jpeg