Hi
Thanks for your help on this.. turns out was something to do with the turbo system and not a viable repair cost wise..

But hope this chat helps anyone else who's car develops the same fault

Hi again

Have had diagnostic and these are the codes
PO381 - glow plug heater indicator circuit malfunction
P2263 ( checked twice ) not listed in code reader manual..
So still nine the wiser
Karen

Thanks for replying
Was actually serviced just last month by our local garage.
Not sure what the AS checked so will get diagnostic codes reread and get back to you..
Again, thank you
Karen

Hi
I have a 1.5diesel 2010 model.. at 80mph the engine management light will come on. No loss of performance..
It will go off when ignition turned off..
AA can't determine why it happens.. Local Nissan dealer have no idea..
Can anyone help?.
Thanks