this code popped up after my tr224, ported heads, sts turbo.. i already had lt's before the other parts. my scanner says manufacture control. ignition system or misfire i know gm's listing reads different than that, i just want to know if anyone else has encountered this problem and does anyone know how to fix it.

i tried to search this code but the site wasnt working so if someone can direct me to some helpful info i would be greatful. thanks.