I really dont know what to do at this point. My 2002 civic si if having such a parasitic power draw and ecu problems. I have a buzzing sound that seems to be coming from near my throttle body area while the keys off but if I pull the fi ecu fuse the buzzing goes away. I've replaced my alternator and re grounded the engine and still continue to have that buzz and power draw. While my 2 cel codes are p0563 and p0600 the only way I can retrieve the codes is by using a jumper wire on the obd port. It won't respond to a obd 2 scanner. Please help me I'm so lost at this point and I cant keep throwing money at it I would like to be able to get this problem sorted out so I can replace the ecu and chip it and swap a k24a2.