1998 Mercury Marquis diagnostic code P0430

1998 MERCURY MARQUIS
239,000 MILES • V8 • 2WD • AUTOMATIC
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ERIC M
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code P0430 keeps engine light on all the time. have been told by others it is a bad ox sensor and won't do any harm. Is this true? and what can be done
Feb 17, 2009 at 6:47 PM
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BLUELIGHTNIN6
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P0430 Catalyst System Efficiency Below Threshold (Bank 2)

Indicates a faulty oxygen sensor on bank 2 of exhaust. Failing to replace it will result in much lower fuel mileage and eventually it will ruin the catalytic converter, a very expensive component.. I suggest replacing the sensor as it is very simple and cheap.


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Feb 17, 2009 at 7:26 PM
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