I have a 2002 defender110 which keeps shutting down into limp mode, i have plug it into a computer and it keeps saying L.H front wheel sensor is faulty but it is not faulty as i have interchanged it with another defender and it works fine, can any one please shed any light on this problem? many thanks Dave.

While not having one as new as yours, I have had several Hyundai's that the tone wheel cracked on and gave weird faults.

i would check you have teeth intact and no cracks, then consider a wiring or electronic fault

Absolutely! As I've just said on another thread, on TD5s (which I'm guessing, as it's 2002), don't forget the physical condition of the wiring looms. The insulation gets tender and the copper goes brittle. This gives all sorts of interesting intermittent faults, particularly in combination with rain and road dirt. There are an awful lot of wires to check on a TD5 though, so it might be a long job!