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David
Dodge Dakota
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8/25/2003
19:29:40

Subject: What does the 420 code mean
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Got my truck checked and it came up 420. looked in the Diagnostic code book and I don't know what it means.



BobMarley
Dodge Dakota
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8/25/2003
20:34:43

RE: What does the 420 code mean
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means its toking time



J and J Auto
Dodge Dakota
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8/25/2003
22:10:52

RE: What does the 420 code mean
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PO420

Catalyst System Efficiency Below Threshold (Bank 1)

O2 sensor or bad cat

First check the connections on the sensors

Larry
J&J Auto



IntenseDak39
*GenIII*
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8/26/2003
12:26:16

RE: What does the 420 code mean
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i get that code about every other week thanx to not have a cat. I have heard that you can simply ziptie the downstream O2 sensor to the frame and it will fix that problem.

1998 Regular Cab V6 Auto

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