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P0431, P0421 codes, help!!

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  #1  
Old 04-27-2008, 05:06 PM
monkey323i's Avatar
1st Gear
Thread Starter
Join Date: Dec 2007
Posts: 88
Default P0431, P0421 codes, help!!

Hi guys:

recently I keep getting P0431, P0421 code CEL from VAG-COM.

After I cleared it, it comes back within 2 days.

This is my 4th time clearing the code. Now definitely sth's wrong.

I searched for some related post, it has sth to deal with faulty O2 sensor, fauty cat converter, or exhaust leak.

Just wondering usually what is the cause most likely?

Is it still ok to drive? like will it do any further damage to my car?

appreciate any help !!!

thx!!!!
 
  #2  
Old 04-28-2008, 11:05 PM
AudiTech616's Avatar
1st Gear
Join Date: Apr 2008
Posts: 98
Default RE: P0431, P0421 codes, help!!

Your gonna need both CAts. Bank 1 and Bank 2
 
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