every time when you have a 29 code....the problems can be on the sensor, the wire or tractor manager.....this code can stay saved on vfc card.....check the distance between the read disc and the velocity proximity sensor this will be on 1mm of distance after that reboot the vfc card codes, turn on the key switch and accelerate the truck for a few moments....after then releace the traction joystick and remake the prove and done!!! the code is over.

mauricio Tapia
from chile