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DIAGNOSTIC CODE P0411 CLEAR CODE LIGHT CAME BACK...

  • Tiny
  • novatech66
  • 2008 GMC Envoy
  • 46,000 miles

Diagnostic code p0411 clear code light came back on what check valve is sticking and where it would be I have a 08 gmc envoy with 4.2l

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Friday, November 2nd, 2012 AT 11:43 PM

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  • Tiny
  • rasmataz
  • Member

P0411 Secondary Air Injection System Incorrect Flow Detected

The check valve is in the air supply line to prevent exhaust gases from entering the air pump-

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Friday, November 2nd, 2012 AT 11:55 PM

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