So I had a SErvice engine soon light turn on on my 2015 SE 1.0 ecoboost. Read the code myself and came up with a P1450. Something about excess vacuum in the fuel tank. Thought it might be as simple as the fuel door sealer thing wasn’t closing good so I just used the filler tool to open and close it a few times. It didn’t go away. Two days later I put some gas in and suddenly the light is off. Should I still take it to a dealer?