fault codes A3 TDI

[Evstdi]

Can anyone shed a bit of light on these please:
17965 charge pressure control intermittent.
17664 coolant temp sender intermittent
18062 interrogate instrument memory

p.s i'm suffering intermittent turbo cut out (limp mode) at the moment, dunno if this is rellevant?
2001 a3 tdi se 120 000 miles /ubbthreads/images/graemlins/confused.gif

 

[rebelist]

whats the complaint ? and what are the symptoms please ???

 

[Evstdi]

getting limp mode when revving out ,moreso when cold,changed maf and n75 and cant see any bad vacuum pipes.