Fuel mix lean?

Tiny
ASHOK SAINI
  • MEMBER
  • 2013 BMW X3
  • 2.0L
  • 4 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 1,700,000 MILES
I have sealed the hoses no leak but cannot figure out this error.
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Thursday, April 20th, 2023 AT 1:28 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
This is usually caused by one of two things, either the fuel filter is clogged up or the MAF needs to be replaced.

Here is a guide to help as well and I have added the filter and sensor locations in the diagrams below:

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

Clear the codes once the job is complete to recheck the system. Check out the images (below). Please let us know what happens.

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Friday, April 21st, 2023 AT 12:31 PM

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