Mechanics

MERCURY MARQUIS BATTERY PROBLEM

2005 Mercury Marquis • 40,000 miles

Changed the catalytic converter and now my check engine light stays on
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Punchinella123
November 8, 2012.




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

Tiny
Punchinella123
Nov 9, 2012.

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