Codes
Q2: The following two codes have been pulled from the ECU; P1423 & P1411. Does anyone know what they reference?
17831
Sec. Air Inj.Sys.,Bank1
Flow too low 2)
P1411
17819
Sec. Air Inj.Sys.,Bank2
Flow too low 2)
Looks like you have a problem with your secondary air system. Manual says to check vacuum lines, secondary air pump and piping to combi valve.
Q1: How important is the secondary air-pump/system to overall vehicle function and/or performance?
Q2: Any ideas for a resolution? I sense the dealer is using this as a means to get my vehicle back to them either for additional work or to check to see if the car has been tuned.
Q3: Is the manual you mention available to me? through Bentley? I'd like to be able to identify and trace the secondary air-pump, combi valve and lines.
Q4: Where can the Bentley site w/ codes be found, ie. web address?
The manual I refer to is the Bentley manual for the Audi A6, available on CD Rom from Ross-Tech among other places.
At a minimum, you should get this manual and a VAG-COM tool from Ross-Tech if you are serious about tuning or understanding what is going on with your car.
There are complete diagnostic procedures for most issues in the manual, and the VAG-COM tool allows you to check your car just like the dealer does.
Here is the link to the DTC table
Good luck!<ul><li><a href="http://www.bentleypublishers.com/tech/audi/audi.dtc.table.htm">DTC Table on Bentley site</a></li></ul>



