abs fault?

i have just had amy rear tyre replaced as i had a puncture. When i turn the engine on now the ABS light stays on and display reads ABS funtion- non function. I have a 03 Citroen xsara picasso lx.Can any one advise what to do and what has caused it?
sarah, September 2007


done
2001 1.8 petrol xsara Picasso today abs non active has appeared but breaks feel fine whats the next step

Aron, May 2015
Possibilities:

1. If you're now using the temporary spare wheel this is a normal situation and the ABS light will go off when the normal sized wheel and tyre is refitted.
2. If a new tyre has been fitted and the size is different to the others then this will cause the problem.
3. When the rear of the car was jacked up to change the wheel the wiring to the ABS sensor may have been damaged.

Bingo, September 2007
link Click here to see other fixes for Citroen.