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john99gtp

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I keep getting this code comming up after a few weeks P0420 Catalyst System Efficiency Below Threshold (Bank 1). What hould I do?
 

BigJermGTP

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Originally posted by john99gtp@Sep 27 2006, 03:50 PM
I keep getting this code comming up after a few weeks P0420  Catalyst System Efficiency Below Threshold (Bank 1).  What hould I do?
[snapback]140842[/snapback]​
I'm assuming it's your catalitic converter. It may be clogged.

Try a new rear O2 sensor. If it still comes up you may have to replace the cat or delete it. If you get a straight pipe instead of the cat you need to tune it out or get a rear O2 simulator.

Just a guess on my part, just giving you some ideas of some things to check.
 

Xtant12

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Originally posted by BigJermGTP+Sep 27 2006, 07:47 PM-->
<!--QuoteBegin-john99gtp
@Sep 27 2006, 03:50 PM
I keep getting this code comming up after a few weeks P0420   Catalyst System Efficiency Below Threshold (Bank 1).  What hould I do?
[snapback]140842[/snapback]​
I'm assuming it's your catalitic converter. It may be clogged.

Try a new rear O2 sensor. If it still comes up you may have to replace the cat or delete it. If you get a straight pipe instead of the cat you need to tune it out or get a rear O2 simulator.

Just a guess on my part, just giving you some ideas of some things to check.
[snapback]140854[/snapback]​
[/b]


He is right.. My cat was F%#ked so I just cut it out completely.. I got that code a few times.. When they cut my cat out it was clogged with Gunk... Then I tuned the codes out and no problems.. I was going to do the cat anyways, that just gave me my push. ;) ...
 

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