My 2002 Ford Taurus 3.0l 6cyl engine with 66,000 miles recently developed a squeak or chirp coming from the drivers side top of the engine. It seems to be coming from a black disk about the size of a silver dollar located just to the left of the thermostat housing. There are wires attached to this disk. It is very difficult to ge a good look at it since there is a large wiring harness that runs across the top of it. I would like to disconnect the wires from the disk but I am concerned that it may mess up the computer. Any ideas on what it might be and if that could be the cause for the squeak? Thanks for your input.