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Engine codes PO171 PO174

Tiny
NEEDLES
  • MEMBER
  • 1917 FORD MUSTANG
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
Wednesday, April 18th, 2007 AT 7:37 PM

3 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
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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Wednesday, April 18th, 2007 AT 10:11 PM
Tiny
BLEPORE
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  • 1 POST
The link is broken.
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Saturday, October 8th, 2022 AT 9:10 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,797 POSTS
Thanks for the info, the links are fixed now.
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Saturday, October 8th, 2022 AT 9:49 AM

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