O2 sensor question, PCM section useless, sorry.
#2
Bank 1 is driver side (1,3,5,7 pistons), bank 1 is called bank 1 because it's on the #1 piston side of the engine. Number 2 sensor is the sensor after the catalytic converter, rear 02 sensor. Sensor 1 is before the converter, sensor 2 is after the converter.