My EML came on recently and went away again. happened on and off for a week or so and now it seem sto be staying on. got these codes and I'm wondering if I need to change the rear lambda(s)? I changed the fronts when I put the Milltek and new cats on so I wonder if it could be related to all the snow melting just now and maybe getting moisture in the wrong places underneath? Or is it as simple as needing to change the rear lambda? is bank 2 the right or left by the way? depending on the price i'd probably change both at the same time.
3.0 Quattro manual ASN by the way
O2 Sensor Heater Circ.,Bank2-Sensor2 Open
Bank2-Sensor2 Internal Resistance too High