I have a 2008 Lincoln MKZ that I'm having a recurring problem with the ABS. My wife usually drives the car and this is the 4th time she's activated the ABS and it doesn't go back to normal. It has a spongy pedal that has to be pumped at least once when stopping. I've had a tech that works at a Ford dealer fix it for me, but it continues to happen. I can't seem to get a straight answer what might be causing it and it's getting pretty annoying. Any ideas? Computer based or mechanical?