. . . "Stopped for petrol, started the car - no message.... once again, 4 miles along and it pops up again.During all this all the electrics seem to function as they should but I did try and shut off everything I could, including turning the light to sidelights.When I arrived home I left the car running and metered the battery 14-15 volts - turned it off and metered it again - same." .