Should I have warnings before catalytic converter failure?

Asked by Apr 16, 2007 at 12:58 PM about the 2004 Ford F-150 Lariat Ext. Cab

Question type: Maintenance & Repair

I have been told by Ford dealer that my catalytic converters have failed. Should I have had an indication or warning before they completely go out?  

2 Answers

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There are warnings other than a check engine light, such as a rattling under the vehicle. If the ceramic in the converter totally breaks loose and turns, it can cause the O2 sensors to trip, and a very rough idle. I have seen converters get red hot and in one case catch the carpet in a ford LTD on fire

10

DOES THE CATALYTIC CONVERTER FAILING, CAUSE THE IDEL TO RUN WRONG OR WANT TO STOP RUNNING , THEN SPEED UP AGAIN ????

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