Changed the catalytic converter and now my check.

Tiny
PUNCHINELLA123
  • 2005 MERCURY MARQUIS
  • 40,000 MILES

Changed the catalytic converter and now my check engine light stays on

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Thursday, November 8th, 2012 AT 7:35 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,362 POSTS

If you haven't reset it, try that. If you did, check for new codes. Something may be wrong with an O2 sensor.

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Thursday, November 8th, 2012 AT 7:38 PM
Tiny
PUNCHINELLA123
  • MEMBER

Are you talking about resetting the computer? Is this done by disconecting the battery cable?

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Friday, November 9th, 2012 AT 2:11 PM

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