Failure of the catalytic converter can result in illumination of the Check Engine Light.
Google+Car Problem Reports
Cadillac DeVille Check Engine Light on Due to Faulty Catalytic Conveter
Cadillac DeVille Problem
16 Reports
Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2005
Average Mileage: 133,250 mi (65,000 mi - 220,000 mi)
Verified
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Visitor, 2005 Cadillac DeVille, 144,000 mi
need new catalytic converter
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Visitor, 2000 Cadillac DeVille, 220,000 mi
Insalled Walker catalytic converter, $128.00 on Ebay. 6 weeks ago...still good
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Visitor, 2005 Cadillac DeVille, 175,000 mi
I had light on CHECK ENGIN went to local Cadillac Dealer and was informed it was the CAT.Con. and I required a new one @ 3667.00 plus labour so I went to a well known muffler shop here in Kelowna,B.C. Canada and had a generic one installed for 350.00 inc. tax.labour and productand it runs just fine now / I was an un:suspecting buyer it had been a taxi in Culver city Ca. sold to a cab. in Nevada / and mills were rolled back to 50.000 miles/ I got all this info after I bought it from car fax ?? / I paid 7200.00 and spent about 3000.00 but it runs like a charm now / but get a used car checked befor you buy I never would have bought a used taxi/limo. grd069@telus.net
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Visitor, 2002 Cadillac DeVille, 70,000 mi
Just out of the 6 year / 100K certified warranty. It cost me over $1000.00 to repair. I was told this is because engine oil consumptiom burns them out.
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Visitor, 2002 Cadillac DeVille, 130,000 mi
Check Engine Light on due to catalytic converter
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Visitor, 2002 Cadillac DeVille, 72,000 mi
replaced catalytic converter a few days latter light came on again. replaced sensor, light came on again. mechanic said needs to be programed.
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