bad catalytic converter

2003 SATURN ION
91,300 MILES • 4 CYL • FWD • AUTOMATIC
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LEINADMW
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MY DAUGHTER HAS A 2003 SATURN ION 3. AUTOZONE PULLED TWO CODES, ONE A MISFIRE. i DID A TUNE-UP FOR THAT. AND A CATALyTIC CONVERTER CODE. i THINK IT WAS A P02 something
I have no rattling or loss of power. I do have some minor idle problems and the check engine light. could this be a bad 02 sensor. midas wants $125 just to let me know what the issue is.

Dan
Feb 5, 2011 at 2:02 PM
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RASMATAZ
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Could be an oxygen sensor problem-have it scanned again for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.
Feb 5, 2011 at 3:10 PM