engine codes PO171 PO174

1917 FORD MUSTANG
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NEEDLES
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on my 95 Mustang Convertible 3.8L these are the codes im geting bank 1 and 2 to lean what shoud I try would it be the fuel mixture and if thats It how do I adjust it on this car
Apr 18, 2007 at 7:37 PM
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SERVICE WRITER
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This problem is usually the mass air flow sensor or a vacuum leak, here is a guide to help with the leak and the MAF sensor location in the images below. Be sure to test for the leak when the engine is cold.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers


Check out the images (Below). Please let us know if you need anything else to get the problem fixed.

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Apr 18, 2007 at 10:11 PM
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BLEPORE
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The link is broken.
Oct 8, 2022 at 9:10 AM
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STRAILER
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Thanks for the info, the links are fixed now.
Oct 8, 2022 at 9:49 AM