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#1
10-14-2007, 11:48 PM
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What does this code mean?
Can anyone tell me what code "po420" translates to? Just in case it's necessary, this is a 1996 Bonneville; 3800, green, etc.....
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#4
10-15-2007, 11:12 AM
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Re: What does this code mean?
My buddy already changed the rear o2 sensor, so the only other real option is the cat itself?
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#5
10-15-2007, 11:49 AM
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Re: What does this code mean?
Did your friend have the code erased with a scan tool after changing the o2?
__________________
 Still waiting for the "good old days" I'll get to bore my future grandchildren with!
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#6
10-15-2007, 05:36 PM
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Re: What does this code mean?
Well that's a great question I forgot to originally ask. But I just called him and he said he had 3 different codes before; he believes they were PO141, PO300, and PO341. Then he changed the rear O2 sensor and YES hes says he DID erase those codes with a scan tool afterwards. And now this code pops up.
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