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P0420???

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Old 05-25-2008 | 09:43 PM
underground6t9's Avatar
underground6t9
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Default P0420???
Does nyone know what exactly that means? I don't know if tis because of my new af/x pcm.
 
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Old 05-26-2008 | 01:01 AM
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12 volt
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Default RE: P0420???
thats the time to smoke a blunt code [sm=pimp.gif]


but seriosly now P0420 Catalyst System Efficiency Below Threshold (Bank 1)

i would say that means O2 heater fuse blown or malfunction in O2 sensor
 
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Old 05-26-2008 | 01:21 AM
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Default RE: P0420???
o2 sensor at the cat hoeeee
 
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Old 05-26-2008 | 01:24 AM
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Default RE: P0420???
Thanks I will replace the o2 sensor.
 
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