Most commonly a faulty wheel sensor but there are lots of things it could be.
Check your tyres are all the same size/aspect ratio/pressure.
Best to get the fault codes read. Phone around for the best price, lots of garages have the diagnostic equipment.
I wouldn't pay more than £35 for the check. Some places will refund the test cost if you give them the repair job so factor that into the cost.
ship, May 2009
