the fuse is in the engine bay above the battery in the black box thingo...
from memory i think, standing in front of the car, its the one 3rd from the left on the top row. or look for the one next to 'engine' (i think that what it says...)
Under the bonnet near the battery there is a fuse box. The fuses use is marked on the inside of the lid. You will want to disconnect the 20A called engine. It will reset your engine fault codes but im not sure what else.