Dirty or loose abs rings would cause this, they're screwed onto the back of the flange on the front, and the same I think on the rear...
Have you had Vagcom on it? When it has the fault.
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Nice
i have put 2 new rings on the front along with sensors, its had 2 bits of wire soldered in on both sides too as this was causing the lights to come on, havent vagcom it since having the wire soldered in, the light never stays on, just flickers on while driving but not all the time, will give the rings and sensors a good clean, thanks for reply
Make sure your sensor is all the way in I had to shave mine as it did this