engine management light gone out after repair???

anyone help me here? my engine management light has been on for a couple of weeks now, so i have booked into dealer for diagnosis and to reset light. the funny thing is, today i have been renewing the narrow bore pipes from the turbo to various other parts of the engine, and after approx 10 miles, the engine management light has gone out. what i wondered is; if i have repaired the fault ie a split hose, will the management light automatically go out itself, or will it have to be reset regardless of the fault being rectified? i dunno whether to phone the dealer tomorrow and cancel my booking, because in the last 2 month of doing my own repairs, i have had to cancel bookings with the dealer on 3 occasions.

It is possible that the light will go out if it is a "soft" fault which has been logged, will automatically gone out. A "hard" fault would need to be extinguished using a reset tool. Highly likely you have rectified the proble.

Sounds very familiar, I had an engine management light on last year. I changed all my small hoses including the one on the left hand side of the inlet manifold which turned out to be split. On the way to the stealers to have the light reset the light went out. It stayed out so i cancelled.

re small bore hoses 

i havent got round to that one yet. awaiting parts delivery. i have changed one of the hoses from the turbo which goes onto a valve which is screwed onto the airbox. how difficult is the accessibility of the hose on the lowest part of the turbo? do you have to get at it from underneath the car? on mine, it likely worn and cracking and due a change. les mason