hi, can anybody tell me what the exact problem is with my car?

the diagnostics fault code is 'p1664' and apparently its the 'injection pump control module' that the fault relates too????

does anyone know excatly what this means ? and is it expensive to get sorted?

if anyone could let me know of anywhere in the north shropshire area(whitchurch/wem or shrewsbury area) that is reputable and would fix the problem i'd be very grateful.

thanks.