I had a cod reading on my car it was34

It varies by year and model, but you can look at the emissions sticker under the hood. It will show all the vacuum hoses and the MAP sensor.

If your sticker is gone, or if you still can't find it, repost your request, because now that I posted an answer, your question goes "off the list" and no one else will see it or have a chance to answer. When you post a new question, all the other experts will have a chance to see it and reply.