The ABS light on my 'x' plate polo gti comes on most of the time. First thing in the morning it may be ok but then it comes on after 3-4 miles. Later in the day it will go out when you start the car but will come on after going 100 yards down the road.
I had the front & rear pads changed & this started about a week later & there may be a bit of air in the system. Would the air make a difference?
I have cleaned the abs sensors on the front wheels, but no luck. My mate from the AA hooked his laptop up to it & it says its a ABS pump fault? He reset it but it came straight back once I test drove the car.
Do I have an expensive repair on me hands....

Any ideas?