Hi all (again), So,i,m about to test my patience and Spine after taking delivery of 2 likely candidates for curing my P0420 emission problem, bank 1 O2 sensors,1 on the firewall side,and 1 just a bit to the right of that,which looking down at it looks doable. The problem is when i get the sensor socket on to the sensor the heat shield stops the socket going as far as it needs to go to be able to turn the sensor, the one at the back of the engine was equally as difficult as getting the socket connected to a universal adapter on to the sensor proved impossible due to lack of space, anybody have any suggestions please. Thanks.