Code P0411, “secondary air injector incorrect flow”?

Tiny
PEANUTBUTTERANDJELLY
  • MEMBER
  • 2009 CHEVROLET IMPALA
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 53,000 MILES
My scanner shows a P0411 code “secondary air injector incorrect flow”

Any advice on what to change/ look for to rectify this. Thanks
Wednesday, September 25th, 2024 AT 5:04 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Yep, this will be the air injection check valve, these will rust and stop working, or the air pump or air pump relay/fuse itself. Here is the fuse and relay location so you can check those out and how to remove the valve and pump, the valve you should only be able to blow through one way if not it is bad and the pump motor you should be able to put 12 volts to see if it works.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Clear the codes after the repair. Check out the images (below). Please let us know what happens.
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Thursday, September 26th, 2024 AT 2:20 PM

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