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What causes the P0171 code to appear in a Buick Encore?
The P0171 code in a Buick Encore indicates that the engine is running too lean, meaning there is too much air and not enough fuel in the air-fuel mixture. This can cause poor performance, reduced fuel efficiency, and potential engine damage. The possible causes for the P0171 code in a Buick Encore include: a. Vacuum leaks in the intake system or around the intake manifold b. A faulty mass airflow (MAF) sensor or manifold absolute pressure (MAP) sensor c. Dirty or clogged fuel injectors d. A weak or failing fuel pump e. A clogged fuel filter f. An exhaust leak upstream of the oxygen sensor To fix the P0171 code, a comprehensive diagnosis should be conducted to identify the root cause, which may involve inspecting the intake system for vacuum leaks, evaluating the MAF and MAP sensors, checking the fuel injectors, fuel pump, and fuel filter, and looking for exhaust leaks.
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