So I'm checking out an SE7 today but it's throwing the following codes

P1590
Po307
Po101

I know what each of them are. I'm a little worried about the 307. Any indication from the others codes that might suggest this is some other than a possible blown headgasket?

The Disco is in beautiful shape, 120k miles, but I don't want to have to deal with a blown headgasket.... any thought guys?

 

At 120kmi if the head gaskets haven't been done then you might have a project.