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2006 Chevy Silverado P0401 DTC

Tiny
BVBOUSQUET
  • MEMBER
  • 2006 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 53,000 MILES
I get this error code quite often. I can cure it by tightening the fuel cap and have replaced the fuel cap. I still get the code occasionally, however. Could there be something other than the fuel cap.

The engine is a duramax.

Thanks,
Bob
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Wednesday, November 3rd, 2010 AT 6:38 PM

2 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Code P0401 has nothing to do with the gas cap or evap system. It's a egr code for not enough flow for the egr.
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Wednesday, November 3rd, 2010 AT 7:26 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Bvbousquet say's>Thanks, do you know what might be causing the problem?
Saturntech9 say's>The first thing I would check is if the egr port is clogged.
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Wednesday, November 3rd, 2010 AT 11:36 PM

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