threw code P0420 bad cat

CanadianEh48

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code 22 VTEC Malfunction.

Update: checked oil again. it was at the bottom mark. added some to bring it inbetween the marks. THANK GOD. VTEC engages correctly, and no more CEL :D now i just gotta get my cat delt with :p
 

xmsleepr

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bump for updates im having the same problem CEL came on 2 days after installing test pipe
 

finch13

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bump for updates im having the same problem CEL came on 2 days after installing test pipe

Of course you're going to get the code if you removed the cat. You need to use the defouler/non-fouler trick. There should be a DIY on here by blacknight or myself or google it, 8thcivic.com has a good DIY as well.
 

TACORICAN

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I had the same problem with my CAT. Eventually I gutted mine out and later bought a used one. The used one gave me the CEL so I'm thinking about doing the De-fouler mod. Should i keep the damaged Cat in the car or replace it with the gutted version?
 

Millz

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my cat sounds like im blending kittens inside it... needless to say im changing it next week

found an aftermarket CAT that bolts on directly & has all the necessary filanges bla bla bla
 

FunnyVictor86

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I had the same problem with my CAT. Eventually I gutted mine out and later bought a used one. The used one gave me the CEL so I'm thinking about doing the De-fouler mod. Should i keep the damaged Cat in the car or replace it with the gutted version?

remove the cat, gut it yourself and definitely do the defouler mod ... i drove with my cel on for about a year, i finally did it ... it really works, i should have done it a long time ago :run:
 
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