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2001 Mercury Marquis Engine Code for possible bad Cat.

Tiny
HYDROGUY
  • MEMBER
  • 2001 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 129,000 MILES
The check engine light is on, my scanner shows a code of P0430 which indicates a possible bad catalytic converter or a bad O2 sensor. Don't know which. The car runs normal. What is the harm of not getting this repaired?
Saturday, March 27th, 2010 AT 9:40 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
If it is running good and hasn't lost power, chances are the catalytic converter is good. However, if you have a bad O2 sensor, it can cause higher fuel consumption, driveability problems, damage to the catalytic converter.
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Thursday, June 10th, 2010 AT 8:01 AM

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