1st and 2nd gear, it seems to rev high between 2000-3000 rev’s which I feel may be a little high for a diesel

If you mean it goes that high when accelerating in 1st and second, then that'd be normal. It shouldn't idle that high, however engine damage will not occur below 4200 (the engine's redline).

For the engine management light, what i'd be tempted to do is check the injector needle lift sensor connection to the leftmost injector, (make sure the plug is clean and tight), check the connector behind the injector pump on the front right hand side of the engine (same procedure) and see if that helps.

Otherwise i'd suspect the timing might be ever so slightly out, but could just be a dodgy connection.

 

Theres a way of doing the diagnostics on this car at home without getting it plugged in. It is quite complicated though.

 

Be a lot easier to read your thread if the writing wasn't in black

 

there's me thinking i was on the psychic's page

 

Sorry, my fault, changed it now