Engine Mechanical problem
2004 Jaguar X-Type 4 cyl Two Wheel Drive Manual 102000 miles

I have just had a new turbo fitted to my jaguar followed by a new oil change.The cat has been cleaned and flushed ect ect.Car is running like a dream with no strange sounds.However my oil light is still on despite the dipstik showing its full.The engine managment light isnt on.Does the oil light need to be switched off on a diognostics computer or has the oil pressure switch been danaged/knocked off?? the oil light origionally came on when the old turbo failed and oil was being by passed through the exhaust system.please help.Its cost me a small fortune allready