I have a BRE coded 2.0TDi 170 q that has just had 70k major service, cambelt and water pump etc through a local InNdy

Whilst driving home last friday my glow plug light started flashing and I think the car went into limp mode (No power). Turned off engine when I got home, turned it on again and the light had gone out

When the service was done on Monday, diagnostics presented fault p0299 relating to under boosting turbo, fault traced to failed diverter valve so it was replaced

Yesterday on the way home the light came on again, into limp mode, engine off and then on again and no light!!

Is there anythng I need to be aware of or needs to be investigated with this issue, before I speak to my indy again

Don't know if it's related but the injectors and loom were all replaced under Audi goodwill in September last year

Any help appreciated