Car going into limp mode

[VWKD]

The last few days I've found my car going into limp mode or at least that is what I think it is basically like driving the car with out the turbo bloomin sluggish. Anyway it seems to happen after I gone over about 60 MPH if I stop and turn off and start again the car seems fine.

I have just ran VAGCOM and go the following

3 Faults Found:
18058 - Powertrain Data Bus: Missing Message from Instrument Cluster
P1650 - 35-10 - - - Intermittent
17849 - EGR Valve (N18): Open Circuit or Short to Ground
P1441 - 35-10 - - - Intermittent
17958 - Charge Pressure: Control Deviation
P1550 - 35-10 - - - Intermittent


Any Ideas where I should start?

thanks in advance.