My old 2002 1.4HdI has decided to play up and started flashing ABS fault then it would disappear. So when checked with reader nothing was logged. As I had a lot of work done on the front end(clutch, drive shafts) I decided to check there and found the RH sensor cable routed wrongly. I took it back to the garage who corrected that and gave the system a good check including the fluid level sensor system. The light came back and whilst it was on screen I got my reader on it with the engine running and it came on with it faulting the rear RH side sensor. So I took off the wheel, the calliper and then the its carrier( had to split them as the calliper gets in way of the access to the carrier bolts) and then the disc and noticed the gap between the sensor and hub was massive. I am surprised it was not a permanent fault as it was so far away. Anyway I removed the allen headed 5mm screw(very tight so needed a socket drive as opposed to a T handle allen key) and cleaned up the face and replaced it thinking job done. It went back as it should with the gap as it should have been although the Haynes does not give a measurement so if anybody knows that I would like to know. Anyway I put it all back together with locktight on the bolts and off I go pleased with myself. And "bing" on came the light, this time permanent and latched. So whether removing it finished it off or not I don't know but I have ordered a new one. I will update hopefully with good news soon!