ABS light is on
 

Right so unfortunately my Scooby wants to play games with me again. I seem to have an intermittent Abs light as of two days ago but its coming on more and more. Any thoughts on what it could be and if so how to tell without having to split everything if that's possible with this. I have heard ticking once which pushes me towards broken teeth on the drive shaft but god knows haha any thought? 2005 2L blob eye WRX


cheers guys and gals

Also it only comes on, on a cold start once its warm and I turn it off and on it goes away. thoughts anyone ?