turbo problem 53 vectra 2.2 elegance dti?

Hi.
I have a 53 plate vauxhall vectra 2.2 dti elegance. The turbo cuts out and the spanner/car sign lights up on the dash.Loss of turbo completely so i turn off the ignition and restart and the thing goes back to normal turbo power again.Used to happen rarely but now has started to do it more frequently( from every other day to sometimes twice a day).
I'm going on a long trip soon and i'd like to sort this problem. Any ideas?