i have ford f150 fx4 how to fix code p0171

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Reynaldo · Answer 1 · 2017-12-10T10:19:03+0000

P0171 Fuel trim lean Bank 1

Start by cleaning the MAF with a MAF cleaner or brake cleaner, it is also important you check and correct the motor oil level.

On this engine you may have to remove the MAF from the air cleaner to use a MAF cleaner.