About a week ago the emissions warning light came on in my car along with the abs and handbrake lights. Those two almost immediately went off but the emissions light stayed on but had turned itself off when I next started the car.
This happened approx three times over the week.
Today I got in my car and the abs and handbrake lights came on and stayed on. There was not emissions light on. My car also seemed to lose and gain power alternately every couple of seconds and my speedo was going up and down like a yo. It would stop doing this if I went slow enough (about 20 mph) but if I accelerated would start again. It then abruptly stopped after about 5 mins.
Any idea what caused this and how expensive it will be to fix?