[IvorETower]

On the basis that most main dealers (and not just Renault) do not run a fault code check when they perform a service, if no warning light is on, there's nothing much to worry about. I was quite astonished to find this out only a couple of years ago; I know that they would like to charge you an hour's labour for running a diagnostic check but if anything was wrong then they would be reporting it and suggesting you pay for the remedial work to be carried out