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Code 21

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Old 11-25-2011, 06:00 PM
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Default Code 21
1995 dodge Dakota 3.9 4x4 now have code 21 where is that located and is it easy to change out? (02 sensor) what is a good replacement? Thanks
 
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Old 11-25-2011, 06:20 PM
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Posting WHAT the code means would help.

21** 02s sensor does not detect rich or lean condition (signal stays at center)

Yes most likely a bad 02 or bad connection or wires.
 
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Old 11-25-2011, 06:55 PM
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Thank you
 
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Old 11-27-2011, 08:46 PM
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Changed out 02 sensor and problem fixed! Thanks Crazy!
 
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