I would change the 02 sensor...and I would unplug the 4 prong CIS sensor and clean the pins and plug it back in, clear the codes and give it a run.
If that code comes up again , then you have to ohm that sensor and see if both sides read the same [ it is 2 sensors in one] ..if not, it has to be changed ..but b/c they are thermistor sensors , a poor connection at the plug will read as a ohm value difference at the ECU , so try that first.
That other post gives the same site as the one I gave you earlier and those codes are HFM/SFI and are not for your car. You have the coerrect codes now.. as far as having all the codes , you know that when you do the retrieve procedure and it finally starts to repeat the first code you got..you then know it has gone thru the entire code search sequence.

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A Dalton