5th Generation Maxima (2000-2003) Learn more about the 5th Generation Maxima, including the VQ30DE-K and VQ35DE engines.

OBD Code 0420 - HELP!

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Old Aug 6, 2002 | 01:42 PM
  #1  
JodyBerry's Avatar
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OBD Code 0420 - HELP!

Well, after 2 times of my code being zero, I finally got a valid code on my 2000 SE. It's 0420 and the description is, "Catalyst System Efficiency Below Threshold". So, what would that mean in laymans terms? Can I fix it? I really hate going to the dealer unless I have to.

Thanks a million,

Bill
Old Aug 6, 2002 | 02:23 PM
  #2  
maxgsxr1
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Re: OBD Code 0420 - HELP!

Originally posted by JodyBerry
Well, after 2 times of my code being zero, I finally got a valid code on my 2000 SE. It's 0420 and the description is, "Catalyst System Efficiency Below Threshold". So, what would that mean in laymans terms? Can I fix it? I really hate going to the dealer unless I have to. p0420 means your cats aren't effeciently working with current calibration........have you ecu (computer) reprogramed (updated)at dealer. should not be charged more than a hour labor.

Thanks a million,

Bill
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