Touareg: 2008 V6 TDI
Join Date: Oct 2014
Location: Sheldon, Australia
Second Vehicle: is not a VW
Thanked 20 Times in 19 Posts
The EGR issue could be one of several things.
EGR Flow restricted/clogged because of carbon build up in the valve or line to the throttle body
EGR Valve stuck
Connectors to the EGR Valve are faulty.
If the light is still there I would take it back to the organisation from where you bought the Treg and get them to fix it under their statutory warranty.
Clearing the codes will not fix the problem. They should know this and, by clearing the codes, are probably stalling for time.
They should be able to check the operation of the valve while it is in the vehicle. That would rule out the electrics and the requirement to replace the valve.
That would leave carbon build up in the ERG lines.
I am basing the above on what I have observed in my 2008 V6 TDI with the BKS engine.
MY08 V6 TDI, Shadow Blue, Beige Interior, Towbar, Air Suspension, LED Load Box (not used).