re:Subject: hlp: Check engine light (Code 2411)

[C1J1Miller@aol.com]

I'm resending this, as the quattro list software tends to "snip" your message 
when you use too many less-than signs...
Here goes:

Marat Spivak wrote:
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:Hi All,

:I am seeking help from the combined wisdom of the list.

:The car in question is a '95 A6Q (5 speed).
:The check engine light is coming on intermittently (with increasing
:frequency lately), and the fault code is 2411 - EGR/EGR temp sensor.  Before
:(and after) the light started coming on, the car tends to ping at
:mid-throttle applications in the vicinity of 2-3K rpm, and sometimes bucks,
:or stutters between shifts when accelerating aggressively.

:The dealer (Bernardi in Framingham, MA) offered to clean the "blockage" from
:the EGR passage for $200.  I politely declined, since I didn't feel that
:they took the time to isolate the fault to either the EGR valve itself, or
:the temp sensor (or any other area for that matter).  BTW, their VW tool
:flagged the fault as no EGR flow detected, but does not necessarily imply a
:blockage in my opinion.

:I am hoping that some of you may have encountered this problem with your V6
:Audi, and would be willing to share your experience.  Ultimately, I'd like
:to troubleshoot the EGR system myself, but lack the necessary information.

:Any help appreciated.

:Thank you,
:Marat
:95 A6Q
:90 100

:p.s. I noticed there is a tech bulletin listed on the AllData site.  Anyone
:know the details?
:269203         APR 92       EGR Implausible Signal Code 2411
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My mechanic asked me the same question about 2 weeks ago; here's what Daniel 
Jones (an audi tech in MA) replied to me when I queried the list:
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This problem is all too common on the V6 engines.  The passage in 
the intake manifold from the EGR valve to just inside the throttle body is 
plugged with carbon.  Get a throttle body gasket and an EGR->Intake gasket. 
 Remove both parts and with a combination of carb clean, compressed air and 
thin mechanics wire clean all of the carbon out.  Reassemble and down the 
road you go.  I was doing about one a week at the dealer.
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HTH, chris miller, windham nh, c1j1miller@aol.com
'91 200q20v ==> http://members.aol.com/c1j1miller/index.html