Hopefully i can help..
These columns are well known for throwing up that fault code..It in relation to the torque angle/position sensor which is part of the steering column being electronic steering assist on that vehicle..the options open really are to replace the column or have the exisiting column repaired..obviously has to be removed and sent away..either way those are the options open really..after which it will need to be re-calibrated - there are alot of places can help or sell recon units you may want to look at...
I do hope this helps..I you need ask anything else or include anything further then please continue before you rate
Thanks. Have had quote for repair from independent garage of £560.
A lot less than Vauxhall franchise. Still pondering as fault has not re-accured to date.