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Check engine light on, PO411 code

Tiny
EATMYSHORTS
  • MEMBER
  • 2008 CHEVROLET TRAILBLAZER
  • 4.2L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 231,000 MILES
Check engine light is on had a friend scan it came up with the po 411 code. They don't test emissions in my area. My question is what will it hurt to leave it un fixed. Seams to run fine.
Monday, April 22nd, 2019 AT 7:47 PM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
This Direct Trouble Code (DTC) is dealing with a problem with the secondary air injection system. This system pumps secondary air into the engine on cold start up to help with the reduction of harmful emission products that happen at vehicle startup.
I have included for you a complete diagnostic troubleshooting flowchart for you in the diagrams down below. Please go through this flowchart and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros
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Monday, April 22nd, 2019 AT 8:08 PM

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