When mine had serious problems about 4 years ago the main dealer kept diagnosing it as a blocked dpf because that's what the computer said.
After repeated oil changes and dpf unblocking they gave up and told me to put it through auction, it would have been 3.5 years old at this point.
Thanks to the help of fellow sufferers and others on this support group I ran through the diagnosis myself, highlighted the egr as the most likely cause. This was after unplugging the airflow meter and cleaning the boost sensor amongst other things.
I made a full blanking plate for the egr from a tin lid (not recommended but I was desperate and the car condemend anyway), found that it fixed the problem, bought a new egr and made a better swirl gasket out of exhaust bandage (still not recommended) and fitted it all myself.
My advice would be to buy an egr from eurocarparts or elsewhere for between £60 and £90 and a proper swirl gasket off ebay for £5 or thereabouts and either fit it yourself or get someone handly with tools, you don't need a mechanic, to do it for you.
Have a look at the bolt heads that fix it all together though as you do need torq bits as well as regular bits (13mm I think) to get everything undone.
Don't worry if the check engine light comes on as soon as you blank the egr completely - this is supposed to happen. What's important is "is the car now running better / fine?" if so then this is probably one problem (there might be others.
As others say you need to have the oil condition reset after every change or the dpf won't regenerate eventually so get multiecuscan and a cable and check yourself, or find a garage with the correct kit and get them to check. This is not the same as the service indicator and you can't check from the dash display.
After repeated oil changes and dpf unblocking they gave up and told me to put it through auction, it would have been 3.5 years old at this point.
Thanks to the help of fellow sufferers and others on this support group I ran through the diagnosis myself, highlighted the egr as the most likely cause. This was after unplugging the airflow meter and cleaning the boost sensor amongst other things.
I made a full blanking plate for the egr from a tin lid (not recommended but I was desperate and the car condemend anyway), found that it fixed the problem, bought a new egr and made a better swirl gasket out of exhaust bandage (still not recommended) and fitted it all myself.
My advice would be to buy an egr from eurocarparts or elsewhere for between £60 and £90 and a proper swirl gasket off ebay for £5 or thereabouts and either fit it yourself or get someone handly with tools, you don't need a mechanic, to do it for you.
Have a look at the bolt heads that fix it all together though as you do need torq bits as well as regular bits (13mm I think) to get everything undone.
Don't worry if the check engine light comes on as soon as you blank the egr completely - this is supposed to happen. What's important is "is the car now running better / fine?" if so then this is probably one problem (there might be others.
As others say you need to have the oil condition reset after every change or the dpf won't regenerate eventually so get multiecuscan and a cable and check yourself, or find a garage with the correct kit and get them to check. This is not the same as the service indicator and you can't check from the dash display.