A6 with possible cat problems
04-05-2012, 06:23 PM
#1
AudiWorld Newcomer
Thread Starter
Join Date: Apr 2012
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
A6 with possible cat problems
Hey everyone,this is my first post around here and i was just lookin for a little help.
I have a 2002 a6 and my CEL has been off and on for a couple months now. I hooked it up to my VAG-COM and the only possible codes I am reading that I could believe to cause it are these:
2 Faults Found:
16805 - Warm Up Catalyst; Bank 1
P0421 - 35-00 - Efficiency Below Threshold
16815 - Warm Up Catalyst; Bank 2
P0431 - 35-10 - Efficiency Below Threshold - Intermittent
I figure it was a o2 sensor but was wondering if anyone around here had any insight on pinpointing which ones are bad and if it could be anything other than the o2 sensors.
All help is appreciated.
Thanks!
I have a 2002 a6 and my CEL has been off and on for a couple months now. I hooked it up to my VAG-COM and the only possible codes I am reading that I could believe to cause it are these:
2 Faults Found:
16805 - Warm Up Catalyst; Bank 1
P0421 - 35-00 - Efficiency Below Threshold
16815 - Warm Up Catalyst; Bank 2
P0431 - 35-10 - Efficiency Below Threshold - Intermittent
I figure it was a o2 sensor but was wondering if anyone around here had any insight on pinpointing which ones are bad and if it could be anything other than the o2 sensors.
All help is appreciated.
Thanks!
04-05-2012, 06:49 PM
#5
AudiWorld Super User
If you have vag-com
You can find the source of problem in the engine module section, because my brain is dam near fried now doing taxes and this I can send this little pdf to help you unlock the marvels of vag-com, take your time to understand it because it's a hell of alot cheaper to be sure than throw good money at a wrong diagosis.
04-05-2012, 06:50 PM
#6
AudiWorld Newcomer
Thread Starter
Join Date: Apr 2012
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
It's the 2.7t, and honestly at over 145,000 mi i feel lucky that this is my only problem.
But it hasn't been running any worse which is why i wasn't suspecting the cats to be the problem. If you could elaborate more on that?
But it hasn't been running any worse which is why i wasn't suspecting the cats to be the problem. If you could elaborate more on that?
Trending Topics
04-05-2012, 10:28 PM
#9
AudiWorld Member
Join Date: Sep 2010
Location: Boston, MA USA
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
Put a can of CRC G2P in the full tank of gas to see if it works.
If not, $100 for 2x O2 Simulator, mini cat
Most think Audi spec is too narrow to throw the CEL. Both cat go wrong at same time is not that usual. What you need to get the light off.
If not, $100 for 2x O2 Simulator, mini cat
Most think Audi spec is too narrow to throw the CEL. Both cat go wrong at same time is not that usual. What you need to get the light off.
Last edited by bigdadi; 04-05-2012 at 10:31 PM.
04-06-2012, 05:13 AM
#10
AudiWorld Member
Join Date: Jan 2012
Location: Denver, CO
Posts: 107
Likes: 0
Received 0 Likes
on
0 Posts
I'd agree with bigdadi - I understand there was an ECU update from Audi at one time to fix this issue, they loosened the threshold for this error since it was costing them a lot to replace cats under the emmisions warranty when they were just wearing out a little. One of these days I'll get a pair of his extenders and solve this - mine throws this every once in a while on bank 2 when I really get my foot in it - I just clear it and go on down the road...
Jim
Jim