TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

Does this code mean one of my O2 sensors need replaced? The front one or rear one?

Thread Tools
 
Search this Thread
 
Old Oct 3, 2007 | 09:47 AM
  #1  
Trey (at pitt)'s Avatar
Thread Starter
AudiWorld Super User
 
Joined: Nov 2002
Posts: 5,603
Likes: 0
Default Does this code mean one of my O2 sensors need replaced? The front one or rear one?

I have a CEL.


-------------------------------------------------------------------------------
Address 01: Engine Labels: 8N0-906-018.LBL
Part No: 8N0 906 018 S
Component: 1.8L R4/5VT G 0007
Coding: 06600
Shop #: WSC 01236

1 Fault Found:
16806 - Main Catalyst; Bank 1: Efficiency Below Threshold
P0422 - 35-00 - -
Readiness: 0000 0000


Thanks!
Reply
Old Oct 3, 2007 | 09:53 AM
  #2  
JohnLZ7W's Avatar
AudiWorld Super User
 
Joined: May 2000
Posts: 21,112
Likes: 1
Default I think it means your cat needs to be replaced, or maybe a flaky cold start air pump

There are specific O2 sensor faults.
Reply
Old Oct 3, 2007 | 09:58 AM
  #3  
Trey (at pitt)'s Avatar
Thread Starter
AudiWorld Super User
 
Joined: Nov 2002
Posts: 5,603
Likes: 0
Default

Well it is a brand new 42DD high flow cat. Has anyone had problems with their cats before?
Reply
Old Oct 3, 2007 | 09:59 AM
  #4  
Scenic Driver's Avatar
AudiWorld Super User
 
Joined: Jun 2006
Posts: 5,540
Likes: 0
Default

That code can also happen if the car is running rich
Reply
Old Oct 3, 2007 | 10:01 AM
  #5  
TTinCT's Avatar
Rest In Peace
 
Joined: Jun 2000
Posts: 24,689
Likes: 0
Default

did you buy the O2 extension?
Reply
Old Oct 3, 2007 | 10:03 AM
  #6  
Lowcountry's Avatar
AudiWorld Super User
 
Joined: Jul 2005
Posts: 4,702
Likes: 0
Default

You need the angle block.
Reply
Old Oct 3, 2007 | 10:08 AM
  #7  
Trey (at pitt)'s Avatar
Thread Starter
AudiWorld Super User
 
Joined: Nov 2002
Posts: 5,603
Likes: 0
Default

Umm.. no.
Reply
Old Oct 3, 2007 | 10:08 AM
  #8  
Trey (at pitt)'s Avatar
Thread Starter
AudiWorld Super User
 
Joined: Nov 2002
Posts: 5,603
Likes: 0
Default

What is that?
Reply
AudiWorld Stories

Bringing Audi to Life for Audi Fans

story-0

New Audi A6 Allroad Is The Market's Coolest Wagon: 9 Things to Know

 Pouria Savadkouei
story-1

10 Strangest Audi Designs That Actually Made Production

 Joe Kucinski
story-2

2027 Audi Q7 and SQ7: Audi Upgraded EVERYTHING!

 Michael S. Palmer
story-3

Audi Unveils Absurdly Cool New Supercar: 10 Things You Need to Know!

 Verdad Gallardo
story-4

The Highs & Lows of Every Audi C-Class Generation

 Joe Kucinski
story-5

Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer

 Brett Foote
story-6

10 Audi Features & Options We Miss the Most!

 Joe Kucinski
story-7

Audi Recreates Crazy-Looking Speed Record Breaker From 1935

 Verdad Gallardo
story-8

Coachbuilder Recreates the 1995 Audi TTS Concept

 Verdad Gallardo
story-9

Every Audi V10 Car Ranked!

 Joe Kucinski
Old Oct 3, 2007 | 10:11 AM
  #9  
Ryan E.'s Avatar
Junior Member
 
Joined: Mar 2000
Posts: 1,943
Likes: 0
Default

How man miles on the DP before you got the CEL?
Reply
Old Oct 3, 2007 | 10:13 AM
  #10  
roadyTT's Avatar
AudiWorld Super User
 
Joined: Jul 2005
Posts: 6,599
Likes: 0
Default

Oh I'm an EXPERT on this one!!!
Reply



All times are GMT -8. The time now is 04:01 PM.

story-0
New Audi A6 Allroad Is The Market's Coolest Wagon: 9 Things to Know

Slideshow: Audi's latest A6 Allroad gets RS-style fenders, real off-road hardware, and enough personality to stand out in a market obsessed with crossovers.

By Pouria Savadkouei | 2026-06-16 17:31:52


VIEW MORE
story-1
10 Strangest Audi Designs That Actually Made Production

Slideshow: 10 strangest Audi designs that actually made production

By Joe Kucinski | 2026-06-10 16:32:29


VIEW MORE
story-2
2027 Audi Q7 and SQ7: Audi Upgraded EVERYTHING!

Slideshow: Everything you need to know about the 2027 Audi Q7 and SQ7

By Michael S. Palmer | 2026-06-09 06:02:56


VIEW MORE
story-3
Audi Unveils Absurdly Cool New Supercar: 10 Things You Need to Know!

Slideshow: Limited to just 499 units, the 987-horsepower halo car signals a new chapter for Audi performance.

By Verdad Gallardo | 2026-06-04 17:37:15


VIEW MORE
story-4
The Highs & Lows of Every Audi C-Class Generation

Slideshow: The highs and lows of every Audi C-Class generation.

By Joe Kucinski | 2026-05-27 16:05:50


VIEW MORE
story-5
Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer

People were more than happy to shell out big bucks for these cars.

By Brett Foote | 2026-05-27 15:32:23


VIEW MORE
story-6
10 Audi Features & Options We Miss the Most!

Slideshow: 10 Audi features and options we miss the most.

By Joe Kucinski | 2026-05-12 19:33:47


VIEW MORE
story-7
Audi Recreates Crazy-Looking Speed Record Breaker From 1935

Slideshow: Audi has recreated one of the wildest machines of the pre-war speed-record era, reviving a streamlined V16 racer that originally exceeded 200 mph in 1935.

By Verdad Gallardo | 2026-05-11 09:49:34


VIEW MORE
story-8
Coachbuilder Recreates the 1995 Audi TTS Concept

Slideshow: A Dutch coachbuilder has reimagined the original Audi TT by finishing what the 1995 concept only hinted at.

By Verdad Gallardo | 2026-05-05 15:17:58


VIEW MORE
story-9
Every Audi V10 Car Ranked!

Slideshow: Ranking every Audi V10 road car

By Joe Kucinski | 2026-04-29 16:11:56


VIEW MORE