I received a surprise today when my 2012 Audi Q5 failed its smog emission test in Nevada. I've never had a car fail and is surprising for a 3 year-old Audi. I was told that it was part of the oxygen ...
I've failed my smog test 3 times in a row within a week. They told me it was the EGR. So I changed my EGR Valve, EGR Solenoid, and my EGR Pressure sensor. The vacuum lines running from the EGR Valve ...