Hi, Im new to the whole of this thing but my dad owns a fiat ducato camper van and the speedo works sometimes and sometimees it doesent and then it just goes mental and shows your doing 60 but ure reli doing 30 can any one help me and dad plz. or what do we need to do . cheers

vehicle details would be helpful

o rite sorry its a 2L turbo deisel.

Hi,
What year is the van? I had a similar issue with my 53 plate 2.0 model and it turned out to be the sensor/sender on the gearbox. Easily changed and not too expensive, mine is the Peugeot model and as far as I can remember it was under £40.
Regards
Stewart

kk m8 cheers for the help.