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Hello,

So I have a 2015 Buick Encore and it has the codes P0172 and P1101. I have replaced air filter, pcv valve hose, valve cover, and EVAP canister. What could the problem be that would throw these codes?

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check the FAQ

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Replace the MAF sensor and get a new PCV valve.  You said you replaced the hose, not the valve.

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