Hi All, My 08 Berlina with 150000 has just thrown up it's very first fault Code, didn't really want to go to the mechanic to pay $100 for a scan so I bought a OBD tool on special at Supercheap, pretty cool by the way. It has spat out system to lean confirmed on bank 2 pending on bank 1. I've taken all of the info and cleared the codes. Yesterday I installed a new air filter. The only one in stock was K&N and seeing as I needed it desperately I bought it. Could this have something to do with it putting out those codes? My old air filter was just that, old so I have noticed that the car is driving better with the new one in. Only difference would be a very very minor rough idle.