I have a 2002 A4, with 62K miles. recently i started getting a CEL with error code P0411. I reset the error code a couple of times hoping it was false trigger but it keeps coming back.
Any suggestion what I can do to fix the problem (other than taking the car to the dealer).
people suggested checking for cracked hoses that come off the air pump. The problem is I donlt knwo where the air pump is
Any suggestion would be greatly appreciated.