2005 Mercury Marquis Changed Catalytic Converter Now Check Engine Light Stays On

2005 MERCURY MARQUIS
40,000 MILES
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PUNCHINELLA123
  • MEMBER
  • 4 POSTS
changed the catalytic converter and now my check engine light stays on
Nov 8, 2012 at 11:35 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
If you haven't reset it, try that. If you did, check for new codes. Something may be wrong with an O2 sensor.
Nov 8, 2012 at 11:38 AM
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PUNCHINELLA123
  • MEMBER
  • 4 POSTS
Are you talking about resetting the computer?? Is this done by disconecting the battery cable ???
Nov 9, 2012 at 6:11 AM
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