Ian - I think Jobyc is indicating a code 1 and a code 41.
Code 1 is a disconnected HO2 sensor, short or open circuit on the sensor circuit of the HO2, faulty HO2 sensor circuit, OR A MISFIRING SPARK PLUG.
Code 41 is a disconnected HO2 sensor, short or open circuit on the heater circuit of the HO2 sensor, faulty HO2 heater circuit, OR A MISFIRING SPARK PLUG.
So basically, it's telling you that both the HO2 sensor circuit and the HO2 heater circuits are having a problem, or you have a misfiring spark plug.
First thing to do is unplug the HO2 sensor and check the pins for corrosion or a pin recessed, and check the wiring to and from the plug. If nothing there, pull the plugs and see if one or more is super clean, indicating that undetonated fuel has cleaned off any carbon or residue. If neither indicate a problem, replace the HO2 sensor.