ok...so I haven't had the chance to buy a new air filter yet...
but so far, I had my mechanic turn off my check engine light and take the old air filter out and kinda shake it around and blow compressed air into it to kind of "clean it out"...then he put the old air filter back and suggested that maybe I should try getting a new air filter...
anyways, a day or two later, (still with my old air filter in) my check engine light turned on again! I will go and buy an air filter soon to replace the old one and see if the check engine light will turn off by itself...but at the moment, I am somewhat doubtful that changing the air filter will turn the check engine light off
i will keep you guys posted...
but in the meantime, do you guys think it could be anything else? my IS doesn't have any mods what-so-ever...