BANK 1, Sensor 1? I have a 1997 Isuzu Rodeo, and it has 3 oxygen sensors, 2 before the catylic converter located on either side of the manifold and a third one located aft of the catylic converter. Does anyone know which O2 sensor is the one called Bank 1 Sensor 1? I do not know if BANK 1 is on the drivers or passenger side. The trouble code reading was P1133 which says Bank 1 Sensor 1. Thanks for any help; two different Isuzu dealers gave me two different responses, one saying BANK 1 was on the drivers side, and the other saying BANK 1 was on the passenger side.