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check engine code help

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Old Aug 7, 2008 | 10:56 PM
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yanxuhec's Avatar
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Joined: Jul 2007
Posts: 4
Default check engine code help
hi there

check engine light went on code p0420 bank1 any ideas ??
accord 99, Lx 4 doors
4 cyl, 2.3L vtec, 5speed

tks
 
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Old Aug 7, 2008 | 11:14 PM
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JimBlake's Avatar
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Joined: May 2006
Posts: 18,398
From: Wisconsin
Default RE: check engine code help
P0420 = catalyst low efficiency.
Check connections at rear O2 sensor (in cat).

But maybe the cat is actually bad.
 
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