2006 Chevy Silverado P0401 DTC

2006 CHEVROLET SILVERADO
53,000 MILES • V8 • 4WD • AUTOMATIC
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BVBOUSQUET
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  • 1 POST
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
Nov 3, 2010 at 6:38 PM
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SATURNTECH9
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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.
Nov 3, 2010 at 7:26 PM
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SATURNTECH9
  • ✓ASE Certified Mechanic
  • 30,869 POSTS
  • ASE Certified Mechanic
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.
Nov 3, 2010 at 11:36 PM
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