Check Engine light with code P0171?

2014 CHEVROLET MALIBU
78,700 MILES • 2.5L • 2WD • AUTOMATIC
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TASHA_01
  • MEMBER
  • 1 POST
I got an oil change yesterday and today my check engine light came on. I took it to two different auto shops, and both came back with the same code of P0171. I haven't noticed any issues other than it is making a lot of noise when I accelerate, even a little tap and it's revving like crazy. Thank you in advance!
Jul 11, 2022 at 7:31 PM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
Hi,

The code indicates there is a lean fuel mixture. Since you just had the oil changed, I suspect either the air filter box intake tube or a vacuum hose has been loosened and not properly installed causing a vacuum leak.

Take a look through this link. It explains how to locate and repair a vacuum leak. Try this and let me know the results.

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

Take care,

Joe
Jul 11, 2022 at 9:52 PM
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