I recently bought a 08 a6 quattro s-line and had a quick question. I have 2 cel codes and wanted to know if a sensor i found unplugged has anything to do with it. I changed my air filter yesterday and the sensor that connects underneath it with 2 vacuum lines was unplugged. I cleaned it and plugged it back in but i keep getting a p0456 evap very small leak code. Im also getting a imt stuck open code too.