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2000 honda crv 90k miles p0420 code, what is usually the problem

 
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  • Answered by:Dan
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Customer Question

2000 honda crv 90k miles p0420 code, what is usually the problem ?

 

Optional Information:
Year: 2000
Make: Honda
Model : crv

Already Tried:
nothing yet

Submitted: 1206 days and 22 hours ago.
Category: Honda
Value: $9
Status: CLOSED

Accepted Answer

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Expert:  Dan replied 1206 days and 22 hours ago.

The problem is almost always the Catalytic Converter, let me know if you have questions. Thanks

 

P0420 Catalyst Efficiency Below Threshold (Bank 1)

Possible CausesSetting Conditions
  • Check for air leaks at the exhaust manifold or in the exhaust pipes
  • Catalytic converter damaged or has failed (deteriorated)
  • Check for poor fuel quality and/or contaminated fuel
  • Front HO2S older (aged) than the rear HO2S (HO2S is lazy)
  • Front HO2S or rear HO2S is contaminated with fuel or moisture

Expert TypeTechnician
Category: Honda
Pos. Feedback: 97.8 %
Accepts: 797
Answered: 12/16/2009

Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database

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