what is this fault code.

[red barron]

You can replace it with something like this,
http://compare.ebay.co.uk/like/30043...var=sbar&cbt=y
Farm parts on bumpers farm chippenham may also have something similar too?
These guys have them, CAV Delphi at £34.00
http://www.thornycroftparts.co.uk/Fu...57_156754.aspx
here.