Hello Gary,
It’s great that you have kindly informed the forum of the successful outcome to the issue (few do!).
Your reply will hopefully be of help to others who experience similar symptoms in the future.
Apologies for being pedantic:-
You say (and confirm?) it was due to a faulty FUEL sender. Logic would point to this being wrong.
Faulty OIL level sensor would make sense - but not a faulty fuel sensor.
Wondered if you could clear up this important anomaly for us.
Many thanks and kind regards,
Gareth.