2001 Subaru Forester codes

Hi -I just purchased a 2001 Subaru Forester with 155,ooo miles on it .
it has 4 check engine light issues!!! code PO303 -code po0179 and two other codes

They WHY did you buy it??

P0303 is a cylinder 3 misfire code. It may be a spark plug, it may depend on the other 2 codes you didn’t post. P0179 is the flex-fuel sensor circuit high input error code. It may be a bad sensor, it may depend on the other 2 codes you didn’t post as well. Post 'em, we’ll see what we can do to help.

So why keep us in suspense about the other two codes. They may point to why you have the
P0303 and P0179!!!Or they may be more important.

Yosemite