Have this hugely annoying intermittent problem which the garage have not been able to reproduce or fix. For no apparent reason, and at varying speeds the car will judder / lurch. Sometimes this juddering will happen once or twice and then its ok again. Less often it will judder quite a few times, then I'll get 'engine reduced performance' message and then the car comes to a halt. Usually I can then re-start the car and its fine but as you can imagine its very disconcerting. If I can't crack it soon I will have to get rid of it which is a real shame as otherwise the car is great. The garage downloaded all the error codes off the computer but it didn't seem to help them.
Thanks in advance for any thoughts...

Hi do you know the trouble codes ? could be anything from EGR valve to cam/crk sensor and many other reasons...Trouble codes should help

There were rather a lot of codes that they downloaded. They are grouped into powertrain, transmission, ICM and Body. Is there a category that would be more useful? There are 2 handwritten A4 sheets which I'd scan in but I can't see an attachement option. Is there one?

If there is a lot of DTCs the best way is to erase them all and re-scan the car few days/weeks later...only engine trouble codes will probably be related to your problem.

If you scan the codes in you can upload them to your gallery then insert them in the post.

Jon Freelander 2, 2014 Dynamic SD4 Santorini Black

I had a similar thing with a Jag, that was the EGR valve sticking/clogged up, garage took it off cleaned it all up and the fault never reoccured again whilst I had the car.

Here are the powertrain codes (haven't written out the descriptions they wrote as I assume you've got some look-up)
P1259-87
P1259-84
P0536-00
P0120-00
P0124-00
B10A2-68
P0335-00
P0336-00
P02E8-00

Car has been absolutely fine since it cut out on me on Saturday, but I know from past experience that it could do the same thing again at any time.... Many thanks

There are two possible faults which can cause juddering and cut-outs - crankshaft sensor problem (P0335,0336) and accelerator sensor (P0120,P0124) the rest of codes should not be related to your problem (immobilizer signal,intake flap etc....).I would point my attention to crankshaft sensor or its wiring first.

A quid says this is the turbo actuator arm. There is a fix kit and lube. With labour it should be £280

is there no way to grab it with molegrips and loosen it up?

Tracy_999 what was the problem and how was it fixed?