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How can you fix CEL codes p0171 and p0174 on a 2001 GMC Sonoma?

Anonymous

∙ 10y ago

Updated: 10/21/2022

Most of the times this is a result of a dirty mass air flow sensor. It is located in the air inlet hose at the air filter housing and has a connector with 3 wires on it. Clean it with brake cleaner or electronics cleaner.

Wiki User

∙ 10y ago

What else can I help you with?

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