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2nd Generation This includes all Eclipses, and Talons built from 1995-1999

Code 420

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Old Sep 2, 2007 | 06:10 PM
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Catch22!'s Avatar
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Joined: Aug 2007
Posts: 79
Default Code 420
Hi

Check engine light came on. Computer reade 420 Catalyst System Efficiency Below Threshold (Bank 1). Anyone give me a hint of what that means and what I need to do?
 
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Old Sep 3, 2007 | 07:08 AM
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racerx55's Avatar
Joined: Nov 2006
Posts: 1,026
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Default RE: Code 420
that means the bowl is clogged and the car wants to get high soon
either you got a bad 02 sensor, or a catalaytic converter is clogged or getting there
 
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