It makes this squealing sound whenever I apply the breaks too. I just replaced the brakes as well). The ABS break, and check engine light are lit as well, but not when I'm driving it.
Also, then I'm driving, I get this sound as if something is scraping against another. The sound comes from the engine. I'm guessing it has something to do with the transmission.
***Edit***
This scratching/scrapping sound increases as I gather speed.
There's also a little grinding and screeching whenever I turn the steering wheel. This only happens when it's in reverse, or drive.