after replacing rear brake shose on my matiz ?

I don`t know on these but have you dislodged/damaged a sensor?Some models pick up their abs off the wheel bearing and others use an exciter ring,usually on the hub,it may be worth having a look at the ring if there is one and check for damaged/dirt/corrosion on the gaps in the teeth and check the sensor also while you are at it.It may be coincidence and have nothing to do with the brakes you have been working on but a good code reader will pinpoint which corner is giving you trouble,good luck.

cdc
November 2013