Fixed Car, Will Travel

The Vue is fixed. After another conversation on the telephone with the service manager, he told hubby how to fix the oil light without driving the car to their place. Guess the computer is set up to notify the owner every X number of miles and since they changed the oil a little ahead of schedule, they forgot to reset it. And the manager admitted that his department made a mistake in not fixing the computer. Is it too late to cancel those magnetic lemon signs?