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What is needed to correct this problem on a 208 Pontiac Vibe?
Vehicle: 2008 Pontiac Vibe 4 cylinder

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P0171 Fuel trim lean Bank 1

Vacuum leaks are the mostly the main cause, if its not a vacuum leak and there is no vacuum leak do a MAF cleaning, what happens is the MAF gets dirty and does not accurately report incoming air

 Try doing a MAF air cleaning  using a suitable MAF cleaning solution

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