2000 Chevy S-10 not passing smog

2000 CHEVROLET S-10
71,000 MILES • 4 CYL • 2WD • AUTOMATIC
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MINE71
  • MEMBER
  • 1 POST
i have a 2000 Chevy s-10 that wont pass smog. I have no computer read outs, and already changed both bank 1 and bank 2 oxygen sensors and the catalatic converter and i still have the nox reading at 1500 ppm. What can I do to correct it?
Feb 24, 2008 at 9:13 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
A problem with the EGR system will cause the oxides of nitrogen to rise-its purpose is to lower the combustion temperature to prevent NOX formation
Feb 24, 2008 at 9:24 AM
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