P2198 code
AudiWorld Super User
Joined: Oct 2001
Posts: 15,311
Likes: 696
From: SF Bay Area, CA
FWIW, don't assume folks walk around ready to talk five character codes memorized in their heads. Thus, spell out what the code is. If it is a simplistic OBDII reader, you may need to look it up--rather than have us each do it. You will get more and better answers that way. Also, searching on the code with the word Audi and/or for models that use the same motor can often give you some decent leads.
Thread Starter
AudiWorld Junior Member
Joined: Jul 2006
Posts: 30
Likes: 0
FWIW, don't assume folks walk around ready to talk five character codes memorized in their heads. Thus, spell out what the code is. If it is a simplistic OBDII reader, you may need to look it up--rather than have us each do it. You will get more and better answers that way. Also, searching on the code with the word Audi and/or for models that use the same motor can often give you some decent leads.
Last edited by yaya; Dec 16, 2018 at 03:14 PM.
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AudiWorld Super User
Joined: Jan 2001
Posts: 5,181
Likes: 3
From: Seattle WA
I have the same engine and year. Ran into the same problem at 90K miles and researched it to death. I have several friends who are Audi/Porsche techs that I can lean on for advice. Everyone said O2 sensors are rarely the problem and hard to properly diagnosis as a fault. This code is very generic and can mean many things as the pre-cat and post cat sensors are reading out of spec. The dealer maintained from the start it was the high pressure fuel pumps based on prior experience. I wanted to rule out potential items that I would have done anyway. Changed oil separator, plugs and filter first go around. No change.
Noticed an increasing sulfur smell from tail pipe and both banks ultimately read the same errors. I finally gave in and spent the big bucks to change out high pressure pumps even though the car ran fine except for the codes. I should have done the pumps myself to save a lot of cash). Problems went away but in the run up to solving the problem I ruined the cats filling them with too much raw fuel when running too rich.
Over time the cats cleared out and things are back to normal. I've read other people with the same problem on the 2011-2012 - 4.2's
Hope this helps. It's all I know!
Noticed an increasing sulfur smell from tail pipe and both banks ultimately read the same errors. I finally gave in and spent the big bucks to change out high pressure pumps even though the car ran fine except for the codes. I should have done the pumps myself to save a lot of cash). Problems went away but in the run up to solving the problem I ruined the cats filling them with too much raw fuel when running too rich.
Over time the cats cleared out and things are back to normal. I've read other people with the same problem on the 2011-2012 - 4.2's
Hope this helps. It's all I know!
Thread Starter
AudiWorld Junior Member
Joined: Jul 2006
Posts: 30
Likes: 0
I have the same engine and year. Ran into the same problem at 90K miles and researched it to death. I have several friends who are Audi/Porsche techs that I can lean on for advice. Everyone said O2 sensors are rarely the problem and hard to properly diagnosis as a fault. This code is very generic and can mean many things as the pre-cat and post cat sensors are reading out of spec. The dealer maintained from the start it was the high pressure fuel pumps based on prior experience. I wanted to rule out potential items that I would have done anyway. Changed oil separator, plugs and filter first go around. No change.
Noticed an increasing sulfur smell from tail pipe and both banks ultimately read the same errors. I finally gave in and spent the big bucks to change out high pressure pumps even though the car ran fine except for the codes. I should have done the pumps myself to save a lot of cash). Problems went away but in the run up to solving the problem I ruined the cats filling them with too much raw fuel when running too rich.
Over time the cats cleared out and things are back to normal. I've read other people with the same problem on the 2011-2012 - 4.2's
Hope this helps. It's all I know!
Noticed an increasing sulfur smell from tail pipe and both banks ultimately read the same errors. I finally gave in and spent the big bucks to change out high pressure pumps even though the car ran fine except for the codes. I should have done the pumps myself to save a lot of cash). Problems went away but in the run up to solving the problem I ruined the cats filling them with too much raw fuel when running too rich.
Over time the cats cleared out and things are back to normal. I've read other people with the same problem on the 2011-2012 - 4.2's
Hope this helps. It's all I know!