Hole in catalytic converter causing poor mileage

2006 BUICK LUCERNE
188,000 MILES • 3.8L • 4 CYL • 2WD • AUTOMATIC
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JESSYO3264
  • MEMBER
  • 15 POSTS
My catalytic converter has a hole in and it sounds awful. How it got there I am not sure. I need to know if I am getting less gas mileage then normal, my gas hand does not work so I am having more difficulty knowing.
Jul 27, 2018 at 2:03 AM
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DANNY L
  • CERTIFIED EXPERT
  • 5,648 POSTS
Hello, I am Danny.

Yes, I am sure having your defective catalytic converter will be causing you to get worse gas mileage/MPG. I am surprised your check engine light is not on. I would suggest replacing the catalytic converter to restore your vehicle's performance, get better gas mileage, and to be able to pass a smog check if applicable. Hope this helps and feel free to ask any questions if needed. Thanks for using 2CarPros.
Danny-
Jul 27, 2018 at 3:16 AM