x trail 2.2 cdi going in to limp mode

[stu whit]

hi my name is stuart and im a new member I have just bought in the last 2 weeks an x trail 2.2 cdi 2006

after only 3 days when I was stopped at traffic light it went into limp mode I was told to pull over and turn the ignistion of and on that worked but it as done it about 3 times now. ( the seller did not want to now)after looking on the internet with no joy I found the Nissan owners club as anybody out there any advice and help before I start to spend silly money many thanks stuart.

 

ps in my youth I was a motor mechanic never worked on diesels ( bmc and Vauxhalls man)but still know my way are cars mainly brakes and suspension