ABS on series one Xantia

[Hell Razor5543]

On Gracie it was 20KPH. It fooled me at first, I thought there was another problem. When I drove her back home the light went out, and has behaved properly since (barring an issue with a cheap sensor).

As far as I can tell, what happens is that when a sensor fails, the system notices this (obviously). When you replace it, the system spots that there is now something there, but until it gets a speed reading it is 'unconvinced' that there is a new sensor in place. Once it gets appropriate data from the new sensor it is then 'satisfied' that there is a working sensor back in the loop.

[aerodynamica]

That's it fixed! Old sensor came out esay enough and new sensor put light out right away so all good so far