okay i know that a number 15 code is an error with the ignition output signal, either its missing or defective, but what does this mean, like what do i need to do next, i've already posted questions with the symptoms my car has, but everyone seems to ignore the error code i tell them, i've said the car starts fine when it hasnt been driven for an hour or so, then the rpms drop to about 1 as the car heats up then the engine dies, im pretty sure this has something to do with the ignition output signal, cuz ive checked my fuel pump, fuel injector and anything fuel supply related, and its all fine, any help please? id really wanna be to drive for more than 10 mins depending on the cars mood, lol. thanks.