fuel problems?

What is your question?

My car has done 200000k's , meticulously maintained, and looks and feels like a new one. Recently the engine management light would come one (now stays on), and on acceleration (especially uphill) the car "lunges" as though there is a fuel starvation problem. Took it to Bosch and the diagnostic code is 2100 and 2114 - fuel pressure sensor/signal. Do I need to replace the pump? Surely a pump either works or doesnt? What else can I try. Where are the affected components located? Thanks Cliff PS : I cant put in my SOuth African Zip code, so I picked one randomly!