IMO neither of those are definitely injector issues.

There are a myriad of things that can cause the limp home mode, but the injectors generally (from what I've experienced, or read) show that they're failing by emitting cold smoke on startup, rough running, poor starting or a mixture of all three - I've got the first two, but no fault codes. They can do the cutting out, but that can also be caused by a fault in the inlet metering valve, a pump failure (VERY expensive) or a blocked fuel filter.

Does it only cut out when you're giving it some beans (or at least putting the engine under load) as that seems to be very common.

I've read that the random limp home mode thing has been cured by cam sensors (cheap and easy swaps), EGR (clean it out them blank it off) and the fuel pressure regulator (cheap and easy to swap). I'd be doing the simple things first before diving headlong into a potentially costly fixes, that may not work, especially as your faults don't (to me at least) definitively point to injector related problems. Many people take the glow plug flashing to mean duff injectors, but it's not always the case.

Also the more I read, the more I think that fault codes are no where near as specific as you'd expect, and often one fault code can be triggered by a problem in one component, but the actual symptom (that the code reader reads) is flagged up somewhere else.