I have the exact same problem!!!!
Nissan Micra K12 1.2 Automatic.
Problem started straight after a service & MOT last week. Car went into limp mode - wouldnt go above 2000rpm. Took it back to the garage and they suggested a fault with the throttle body. Wasnt convinced, so took it to...
Did you get this sorted?
Strangely, I have a very similar problem.
The car isnt mine, so dont know the whole history of it but - Was jump started with terminals crossed. Some work was done on it and it worked for about 2 years, now an error has developed.
The car was stuck in limp home...