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Running to lean code P0171

Tiny
SAMGREW
  • MEMBER
  • 2009 CHEVROLET AVEO
  • 1.6L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 112,000 MILES
Keep getting code saying running to lean, had code saying o2 sensor bank 1. Replaced sensor. Now car hesitates on take-off and during acceleration. Kind of surging during acceleration. Checked for vacuum leaks, found none. Checked intake hose between MAF & Throttle body, everything tight. Cleaned MAF. Still getting P0171. All codes cleared but, car still surging during acceleration
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Thursday, April 3rd, 2014 AT 3:48 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,261 POSTS
Hello,

When the engine misfires it will produce a lean code due to the air that is released into the exhaust. I would start with new spark plugs to help that problem. Here is a could of guides that will help you.

https://www.2carpros.com/articles/how-to-change-spark-plugs

and

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

Please let us know what happens.

Cheers, Ken
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Monday, June 26th, 2017 AT 9:25 PM

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