Dealer checked and says the scan reports an issue with the oil pressure sender. Ordinarily this is just the sort of thing where I would be happy to get a new sender and fit it myself, but the dealer says I would also need to run diagnostics to clear the fault after fitting. So I have reluctantly agreed to get them to do it. I am rushed off my feet with work and my daughter is returning to her Uni digs this weekend so I don't have time.