2004 V70 235kmi. I am getting the engine system service required message displaying on the dash. It comes and goes, but comes and stays on longer recently. Does anyone know for certain what issues can cause this message to display? It seems the cruise control does not function while this message is displayed which is becoming problematic. I checked for codes but none ever get stored that I can find. The car has high miles, and the original clutch. I don't want to put a whole bunch of money into the car(no trips to the dealer are going to happen) as when the clutch starts slipping I already decided to pass this car to someone who wants to replace the clutch themselves, or send it to the great beyond. If you know for sure what issues cause this service message, please post them! Thanks!