Hey y'all happy new years eve :)
I got the code p0171 and have recently narrowed it down to a small exhaust leak in the exhaust manifold passenger side. Turns out one of the bolts broke off at some point .

​​​​​​So question is, can a mechanic or exhaust shop handle this, and what is typically the price range? Or is it okay to use a sealant like jb weld and seal it around the where the leak is?
My tools and knowledge is very limited and I'm afraid I'll only make the problem worse


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