non start yaris automatic

[Marko116]

hello everyone, need some help with my wifes car, today it would not start,
turn over the key and nothing, checked battery and i got 12 volts so its not that.
check the codes and only found one code which was a u0100 code which is lost communcation with engine ecu. has anyone had this before???
i left the car overnight and try again but still will not start or turn over with the key, its a werid one. just got no crank.
the car is a yaris 1.33 automatic on a 2010 plate.
any help would be great because my wife needs the car to take the kids to school one more week.
many thanks
mark