I have been plagued with this problem and i have sorted it as follows I put two new rear tyres on and that caused light to come on . light would come on after approx 8 miles I used a piece of string to check diameter of tyres and found rears same dia but fronts where 35mm smaller fronts where ...

I am trying to remove my lower front ball joint it seems to be well in are they pressed in is there a tool to remove them can it be done without removing hub  >:(