NO fuse I know of for this light. If you fixed the engine problem, you have to reset the light. Try removing the ecm FUSE IN THE FUSE PANEL AND REPLACE IT AFTER A MINUTE OR SO, OR REMOVE THE BATTERY CABLE AND REPLACE IT AFTER THE SAME AMOUNT OF TIME.
No there is no fuse for a check engine light either the light works or it don't(bulb that is)
How to reset the check engine light by removing the fuse on a 1992 cadillac eldorado 4.9l and witch fuse is it