Light on dashboard, Fiat Ducato

SeasideBill correctly identifies the indication as an ENGINE OIL LEVEL WARNING LIGHT SENSOR FAILURE.  I have the same and was told that there are two sensors involved, one at the top of the engine (simple to replace) and one at the bottom of the engine (not so simple to replace - an engine out job).  The nature of these sensors is that they can be too sensitive and often give false info.  This indicator is saying it is a possible sensor failure not an oil related issue. 

I was shown that when turning on the ignition, before starting, I should allow the engine management to do its thing and you should see the dashboard display go through a short sequence concluding with a bar chart. Once this is done then start the engine and all should be well.  I have found this to be true except if my MH has stood for some time, when the "system" does not always get the OK from the sensors straight away and the issue in question is displayed.  It is annoying but I have got used to it.  Usually, after a short run, the next start will OK.