hi I have a fiat ducatto Elddis CV40 campervan , the ABS,ESC, Traction lights came on dash board vehicle drives ok, was put on diagnostic unit and showed up as drivers rearwheel sensor fault, bought a new sensor fitted it , but now lights still on when put back on diagnostic it says no ABS fitted ??, do I need to drive the van to reset this error guys , supposed to be going up north for a few days, any help is appreciated.