bringing this back from the dead.. Ever since I swapped to hawk HPS pads, I was getting some brake squeak at lower speeds. It would only occur when the brakes had been warmed up from driving a bit, and I only noticed it in the afternoons while in stop and go traffic. I just figured it was the pads, and closed the window so I couldn't hear it.
Now that the weather is cooling off, I've been driving more with the windows open, and noticed it was only coming from the left front. Thinking back to this thread, I checked the brake sensor this weekend. I actually didn't really check it as much as I reached back there and pushed on it and sort of bent the arm a bit more.
To my surprise, on the way home yesterday, in stop and go traffic, the squeak was practically gone. I got a couple of really short chirps when applying the brakes, but none of the constant squeak, squeak, squeak, squeak, squeak, I was getting at low speeds.
so check your brake sensors!