related faults?

[accy]

Whilst doing 80mph on the motorway the engine light came on and then lost the boost.... the following faults came up

17932 (p1524)........fuel pump relay
18027 (p1619)........glow plug relay
17957 (p1549) boost pressure (n75)
17996 (p1588) engine mount solenoid

Reset the codes and everything seemed fine for a couple of days...but the boost preesure control valve (n75) and the engine mount solenoid still come up every now and then..
Have noticed that when engine mount solenoid fault comes up the gearchanges are not so smooth.....

[benjie]

I don't really have any experience of this, but it seems unusual for all 4 of those parts to go faulty at once, so I'd look at wiring first.