Service light fix trouble code P0171?

2009 NISSAN MURANO
199,000 MILES • 3.5L • 4WD • AUTOMATIC
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LIONELL8732
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I need some help trying to figure out how to fix trouble code PO171 engine was fumbling badly... Had to pull over and shut the car off... Once started backup drove fine then boom it happy again
Jun 30, 2026 at 12:25 AM
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LIONELL8732
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  • 150 POSTS
It's act up when the engine heats up but once cool down it drive normal.
Jun 30, 2026 at 6:49 PM
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STRAILER
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  • ASE Certified Mechanic
Code P0171 means the engine computer is seeing a lean condition on Bank 1, which means there is too much air or not enough fuel for that side of the engine. The most popular fix for this is to replace the MAF sensor which is a regular maintenance item. Also, can I ask if the engine has an exhaust leak, this can cause the issue as well. Here is a guide to go over which tells of the problem in more detail, and I have included location of the MAF sensor which is near the air filter housing as well so you can swap it out, it is easy.

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

Please clear the codes once the repair is completed. Check out the images (below). Let me know how it goes
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Jul 1, 2026 at 1:33 AM
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