I have had the following codes diagnosed on my 2003 Vectra auto by an independant garage:

P0138 - O2 sensor circuit high voltage bank 1 sensor 2
P0141 - O2 sensor heater circuit bank 1 sensor 2

As I have already thrown unnecessary money at Vauxhall I have little confidence in what they will do to resolve this - although the garage above advised that I take the car to them.

Can anybody advise what the suspected outcome at Vauxhall should be (e.g. what diags they should perform etc)...