i am a new mod guy i guess you could call it and i really am into it now. now that i got that off my chest, i bought a reprogramed pcm off the pfyc.com website (which is really good i think) but when i installed it i get the check engine code. i can not stand looking at that it just burn in my pupils when i am driving my baby. anyway i figure it is because the O2 sensors might need to be replaced. i honestly don't know but that is my best guess. i need help if anyone has an opinion on what the problem is or how get rid of it your advice would be a great addition to an otherwise clueless guy. thanks