12v-V6 codes and engine check light.

[Kent McLean]

Beatty, Robert wrote:
> Had this 1995 A6 Quattro sedan for a year and a half now.  The engine
> check light comes on at some point everytime I drive any distance.  No
> change in performance.  When pulling the codes with Vag-Com, I get an
> EGR related code. 
> 
> Here is what I have done.
> 
> 1.  Completely cleaned the passage into the intake manifold from the
> EGR.  
> 
> 2.  Verified EGR is holding a vacuum by using a 30cc syringe and some
> tubing.  
> 
> 3.  Verified the solenoid on the passenger side wheel well that controls
> the canister and the rest of the recovery circuit.  
> 
> The last thing left in the troubleshooting is replacing the ECU.  

I'll start off saying "I don't know." But...

The CEL usually comes on when a sensor doesn't respond properly. For example,
a bad O2 sensor will throw a code.  I didn't notice anything about a sensor
in your post. Does the EGR have a sensor? (I don't think the solenoid would
qualify.)  If so, check it and its connections.

-- 
Kent McLean
'91 200 TQA #1, for sale
'91 200 TQA #2, no name yet
'94 100 S Avant, "Moody"
'89 200 TQ, "Bad Puppy", up in smoke