2005 Chevy Cobalt Emissions

2005 CHEVROLET COBALT
35,000 MILES • 4 CYL • 2WD • AUTOMATIC
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FKNUT2002
  • MEMBER
  • 1 POST
Just failed emissions test. They gave me codes p0420 and p0455. I did how every drive for a while without a gas cap on (a few months). I recently replaced it, could that be the cause for both failures?
Jun 4, 2009 at 2:36 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
Yes, it could. Keep in mind, the vehicle has a 5 year 50K emissions warranty from the manufacturer. They will repair or replace any emissions component that fails 100% during that time period. I believe your car falls under that at this time.
Jul 9, 2009 at 10:12 PM
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