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0420 code

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Old Oct 4, 2004 | 09:41 PM
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Default 0420 code

Can anyone give some advice on this code? 02 sensor on left bank?

Car only has 20,000 miles. Or at least a good link to interpreting codes.

Thanks in advance!
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Old Oct 4, 2004 | 09:48 PM
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http://autoclinic.net/php_test/dtc_search.php


Originally Posted by jimz
Can anyone give some advice on this code? 02 sensor on left bank?

Car only has 20,000 miles. Or at least a good link to interpreting codes.

Thanks in advance!
Reply
Old Oct 4, 2004 | 09:48 PM
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Originally Posted by jimz
Can anyone give some advice on this code? 02 sensor on left bank?

Car only has 20,000 miles. Or at least a good link to interpreting codes.

Thanks in advance!
Catalyst System Efficiency below threshold, left bank. Change anything on your car lately? I wouldn't expect to see that unless you removed your cats, or they actually went bad.
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Old Oct 4, 2004 | 09:57 PM
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jantzer tb, and vinci programmer. and thanks for the link.

You guys are fast!
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Old Oct 4, 2004 | 10:07 PM
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get ready to have the cat replaced on the driver's side. mine did it at 48k miles. there are others on the boards that have had the same issue. it's a free replacement atthe dealer for 80k miles.
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Old Oct 4, 2004 | 10:26 PM
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Hope it's the O2 sensor. If not time for lt's and I want to try Texas Speed's catted y pipe, looks nice.

By the way Vinci programmer is really nice. When it's cam time gonna be Vinci.
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Old Oct 4, 2004 | 10:31 PM
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it won't be the o2 sensor. it would be a different code. they replaced the cat on my car and the code never came back. it's a free replacement. other than your time taking it to the dealer.
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