Check engine light is on and code P0171

Tiny
DAN LUKER
  • MEMBER
  • 2007 CHEVROLET EQUINOX
  • 3.4L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
Engine check light is on. Running lean on bank one cylinder code PO171.
Thursday, May 28th, 2020 AT 12:47 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,047 POSTS
Hello,

This code is caused by an engine misfire, bad injector. lets start with a tune up and while the spark plugs are out please check the condition of the plug you are looking for one plug that is different from the rest.

This guide will help walk you through the steps:

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

and

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

Please run down these guides and report back.

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Saturday, May 30th, 2020 AT 11:42 AM

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