Bad catalytic converter

Tiny
LORAN WADMAN
  • MEMBER
  • 1999 CHRYSLER 300
  • 3.5L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 148,000 MILES
Will a bad O2 sensor cause the catalytic Converter to go bad?
Saturday, March 4th, 2017 AT 1:11 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,002 POSTS
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.
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Saturday, March 4th, 2017 AT 7:05 PM

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