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Old 10-28-2007, 10:12 PM   #1
gmatt55
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1997 SL2
Default P0421 code on 2003 L300

2003 L300 with 103,000 miles. Bought the car used about 3 months ago from the local Saturn dealer. Check engine light came on a few weeks ago. Took it to the dealership, and was told that it could be either the thermostat or the catalytic converter. They said the thermostat was the first thing to check/replace, so they replaced it at a cost of $630. The check engine light has never gone off. Took the vehicle to Autozone, and it shows a code of P0421 for a defective catalytic converter. The car runs fine, doesn't burn or leak oil. Do I need to replace the converter?

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Old 10-29-2007, 02:53 PM   #2
kickarse
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Default Re: P0421 code on 2003 L300

HOLY MOTHER OF COWS! You got shanked by the dealership for such an easy to fix part!

Yes you do if you ever want to pass emissions testing for your state inspection.

...
02 Saturn L200 - 156k miles - Black on Black
- HIT! 96 Saturn SL2 - 172k miles - Fire Red
- SOLD 97 Saturn SL1 - 126k miles - Green/Brown Speckle

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