"O2 sensor heater circuit, bank 1 sensor 2" is P0135's counterpart for the second sensor on bank 1, the one after the catalytic converter. It is about that sensor's built-in heating element rather than the oxygen figure it reports. The bank and sensor numbers are the engine computer's own.
This is a standard code. It means the same thing on every make of vehicle.
O2 sensor (rear) on the Dashboard is the reading from a sensor behind the converter, and the Full scan's on-board self-tests give the heater results sensor by sensor, so sensor 2's heater appears on its own line rather than lumped in with sensor 1's.
The Dashboard shows Short fuel trim and Long fuel trim, Air flow, Manifold pressure, Intake air temp, Coolant temp, Throttle position, Accelerator pedal, Air/fuel ratio, O2 sensor (rear), O2 sensor current and whether the Fuel system is in closed loop. Record a drive and the Analysis screen gives the total correction At idle, Fuel trim against air flow, and whether the air flow and pressure sensors agree; the Full scan's On-board self-tests list the Oxygen sensor results by bank and sensor. Record before and after a repair and Compare shows the change in short, long and total trim at idle plus which codes are Gone, New or Still there.