ok, i was sort of driving my car a little harder than usual last night and everything was fine, i even let it cool off for like an hour and a half. but at the end of the night when i was driving home, my check engine light came on, but it only blinked once. i have a 99 civic hatch DX with the stock motor in it. i know i have a small leak in my exhaust manifold but i have a header on the way. does anyone know what it could be?? or is it the leak in the manifold???????

 

is the check engine light still on? if it is see what code its throwing out from the ecu