I have owned and driven a 2011 Sonata for the past 9 months (12,000 kms). In the last two weeks the eco light on the dash has delayed coming on until the car has been driven for five minutes or so - usually around three kilometers. Once it comes on, it will function in the normal manner and will come on the moment the car moves even after it having been parked for a while. Has anyone else had this experience? My thought is a sensor problem or a loose connection but I am not sure. Any suggestions before I take it into the dealer? Thanks.