Help. Daf xf 95 430 keep revving it self

Hello,

My Daf XF 95 430 Automatic it is currently revving it self every now and then while parked engine on idle, also it does happen while driving the gear engages to N then revving high.

any one can help what would be the problem any suggestion will help.

on diagnostic we get the following faults on engine

front wheel speed sensor
and the same fault on transmission box.

thanks

change the front wheel speed sensor, it will possibly cure the transmission code too

shuttlespanker:
change the front wheel speed sensor, it will possibly cure the transmission code too

Thanks, will try to change and see, hope it resolve the problem