2001 Nissan Altima cat converter

2001 NISSAN ALTIMA
118,000 MILES • 4 CYL • FWD • AUTOMATIC
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JUSTO8705
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  • 1 POST
the other day my ses light came on so I went to the nissan dealership and pulled a p0420 code. I also notice clunking/knocking noise within the engine. Could this noise be caused from a clogged cat converter? This is so frustrating pls help...thank you
Aug 29, 2010 at 10:48 AM
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DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Code can be set by exhaust leak befor CAT also injector or spark plug missfire if none of thoes then CAT is faulty
Aug 29, 2010 at 1:15 PM
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