1995 Ducato with Ignition key problem

Anyone who can advise me on starting problems with my 1995 Ducato Diesel.....
The Micro Chip or ignition are giving problems, on occasion the warning 'key' light stays on so she will not start.
Is there an easy fix to override or do I really need to buy new key with ignition ?
All help greatly appreciated,
Thanks,
Jon
Anyone who can advise me on starting problems with my 1995 Ducato Diesel.....
The Micro Chip or ignition are giving problems, on occasion the warning 'key' light stays on so she will not start.
Is there an easy fix to override or do I really need to buy new key with ignition ?
All help greatly appreciated,
Thanks,
Jon
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