At first it was only a hick-up. Engine service light goes on then off. Dealer said there was no code so they can't fix. After many months now the vehicle occasionaly spits and sputters for 5 minutes and then runs like nothing is wrong. Also notice that during these occasions it will kick on the service light but on the next spit and sputter will kick off the light. Also if the cruise control is on it will kick that off.