Full lock clicking, but not the cv HELP !!

Grant-s3

Nogaro Blue
Joined
Jun 18, 2013
Messages
73
Reaction score
6
Points
8
Location
Glasgow
Hi guys, just bought myself a 2002 audi s3 (get some pics up soon). The other day my front left speed sensor went as my abs and traction lights came on, did an OBD scan and that flagged up, soon as it happend there is a clicking noise 3/4 to full lock Turning both ways, my dads a mechanic,did a road test and its not the cv as it does the same speed click no matter what speed you drive, it can stop and return in the same turn. What could be caused by this? Thanks.