I ran across a barn find of sorts. Covered in dust and only a few thousand miles on a 2012 1600gtl. Check engine light is on. I'm wondering what to look out for. From some of the reading I have done, the fuel pump may be causing the light. I'm confused on how it can run and still have a check engine light for the fuel pump. Maybe clogged up and low pressure? It could be something completely different, as I'm guessing at this point. The owner passed away and I'm thinking of buying it as is. Thoughts?