Where's a good place, that isn't expensive, to have your car looked at since the "maintenance required" light is on? I'm sure it's because I've reached a certain mile marker and that nothing is wrong as I've driven another 400 miles since it's been on and my dash hasn't lit up like a Christmas tree. Will someone run a FREE diagnostic on it just to get the damn light to turn off? It's a 2006 Toyota Corolla with 18K on it.