Why is the ford transit remote key not working?

The Ford Transit's remote key may simply stop working because its battery needs replaced. Remove the plastic key fob cover and pop out the 3 volt battery and replace with the same voltage. It may also be faulty because internal wires have become displaced or broken. In some circumstances the remote must be reprogRammed either by the dealer or following the instructions found in Your owner's manual. Usually, with one working fob, it is simple to re-progRam the non-working key by following the prompts in Your car's menu. Check the Transit's cabin fuse box for a blown plug connected to the module for the remote feature. It is found to the left of the steering wheel under the dash panel above the brake pedal.