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Tiny
PITAX1
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I have a 98 pontiac thansport, it has a p0420 code
i cant figure out what I would look for in the #1 bank
doug
Thursday, March 22nd, 2007 AT 11:56 AM

3 Replies

Tiny
SERVICE WRITER
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It has to do with the converter not being perceived as efiecient enough. Has the converter been replaced?
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Thursday, March 22nd, 2007 AT 6:50 PM
Tiny
PITAX1
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Yes about a year ago.
There is only one converter so why wouldnt both banks have a problem
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Friday, March 23rd, 2007 AT 10:54 AM
Tiny
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If I could give you an intelligent answer on that I would. One possiblitly is a leak on that side that is allowing the exhaust gases to be altered. That will throw this code.

The code you show, suggests that if a converter was replace with one the varies from the original, such as a universal, the code will be thrown for that as well.
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Friday, March 23rd, 2007 AT 5:56 PM

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