P0420/P0422...

Reply Subscribe

Thread Tools

Search this Thread

09-20-2008, 03:24 PM

#11

MCPaudiTT - DEFCON 1

AudiWorld Super User

Join Date: Nov 2004

Posts: 10,902

Likes: 0

Received 3 Likes on 3 Posts

Stock or modded?

Reply Like

09-20-2008, 03:24 PM

#12

MCPaudiTT - DEFCON 1

AudiWorld Super User

Join Date: Nov 2004

Posts: 10,902

Likes: 0

Received 3 Likes on 3 Posts

Send an e-mail to...

mike@mcpii.com so I can file it. I will let you know when they are available.

Reply Like

09-20-2008, 03:31 PM

#13

sTTevo

AudiWorld Senior Member

Join Date: Jun 2004

Posts: 1,190

Likes: 0

Received 0 Likes on 0 Posts

stock

Reply Like

09-20-2008, 03:58 PM

#14

MCPaudiTT - DEFCON 1

AudiWorld Super User

Join Date: Nov 2004

Posts: 10,902

Likes: 0

Received 3 Likes on 3 Posts

If it's high mileage, may be time for new O2 sensor(s).

Reply Like

Reply Subscribe

Related Topics

Thread

Thread Starter

Forum

Replies

Last Post

Cat converter code

Pchelka01

Audi allroad

05-12-2012 08:44 AM

Got a cel for PO421, Warm up catalyst below threshold...bad cat? bad 02?

Onebad S4

S4 / RS4 (B5 Platform) Discussion

11-12-2007 11:20 AM

o2/cat 16805 update - interesting......

audi2.7audi

A6 / S6 (C5 Platform) Discussion

05-03-2007 06:31 PM

Will a bad cat ever throw a code on a '93 90q? (yes, STFA'd)

cashguzzler

Audi 90 / 80 / Coupe quattro / Cabriolet

05-01-2006 08:58 PM

Will OBD I throw codes with no cat?

escargot

Performance and Tuning

12-19-2003 08:26 AM