How do I fix it has very little compression in one cylinder on 1995 Plymouth Neon

This is the single ohc engine.I thought it was a bad valve, its very hard getting up hills how do I get that fixed and how much does it cost?

Asked by for the 1995 Plymouth Neon
the head most likely will have to be removed and a valve job done.

cost runs around 1200-1500. i would have a shop check it for you before jumping to conclusions.

Thanks for your help