Bad catalytic converter

1999 CHRYSLER 300
148,000 MILES • 3.5L • 6 CYL • RWD • AUTOMATIC
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LORAN WADMAN
  • MEMBER
  • 1 POST
Will a bad O2 sensor cause the catalytic Converter to go bad?
Mar 4, 2017 at 1:11 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
It can. If the computer sees the wrong information from the sensor it could cause it to think it was running lean and add fuel to the mix. The extra fuel would cause the converter to run hot and burn out the catalyst.
Mar 4, 2017 at 7:05 PM
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