I just bought a brand-new, 2019 Kia Sedona. Within a few weeks (about 400 miles on the car total), the check engine light came on for an evap leak. Took it to the dealership and they were not worried, said it's extremely common and probably due to "air in the tank" from the last time I filled up. They tightened the gas cap and cleared the light. One day later, the light is back on. So, what should I do? I don't really want to keep scheduling appointments at the dealership if they are just going to clear the light and say there's no problem. Could the gas cap be faulty? Is the sensor bad? Is there actually a leak in a car with 400 miles on it? My plan was to finish off this tank of gas, fill up at a different station and see if the light goes off. Any other suggestions? This is pretty annoying with a brand-new vehicle.