Hi Stylesy24 me and the mrs had same
problem with our leon cupra 03 it turned out to be down to brake pads and discs not had a
problem in over 13months since changing brakes wasnt sure if it was to do with sensor on pads triggering it to come on and stay on. The first garage i took car to said maf sensor or abs fault i tryed swopping maf senson but didnt make a diffrence so he said its gonna be fault on your abs system and thats what was giving me the
problem. Thankfully i had no money at time so couldnt get get abs system sorted any way a few weeks later and m8 turned up he said he once had same
problem on his old leon and he said it turned out to be down to brake sensor on pads but he wasnt gonna say for sure he just said it might be pads and discs. anyway to cut a long story short we changed pads and discs on front of car as these was looking really warn out. luckily once we changed the pads and discs the traction control light went out and not had a single
problem since lucky m8 suggested them as when we took old ones off it was just metal on metal and discs was all cracking on the edges. i havent a clue how it passed its mot on them brakes as it was only done month before they was that bad im surprised they even stopped the car anyway hope info helps m8.