I solved it. I was looking at the vent tube thinking that it was where the pcv was supposed to go because the other hole in the valve cover (passenger side) had a plug in it. After researching, I found out that the pcv was supposed to be on the passenger side. So I searched farther back on the cover for the pcv, and I found that it was not hooked up. It was hiding in some hoses. The previous owner must have lost it and replaced it with a plug.
Now, I need to erase the codes and see if that was it. There are four codes, but I think this could have been responsible for all of them.
Thanks for the response.