Hello VX people. Have popped in to see if anyone has heard of this issue. I have "vauxcheck" from Gendan on my garage Pc although I no longer have my Omega v6 2.6. Anyway nearly a year ago the check light lit up on the sons girlfriends 2006 corsa c 1.2 twin port . No problem, plug in the computer and O2 sensor 1 fault code came up, replaced that and all was well for a few weeks when the light came on again, plugged it in again, this time 02 sensor 2 is the culprit, replaced that and all was well for a good few months. A couple of weeks ago the light was on again, plugged it in, 02 sensor 1 again. Suspecting her commute of only 2-3 miles to be the problem, car never warming up fully and always running rich having contaminated the sensor I replaced it again. The light came on again after a few days and I had to admit I was out of ideas. A free check at a local independent suggested 02 sensor 2. Not convinced I urged her to go to the main dealer for a proper diagnostic. She did this and they say the op relief valve is faulty and there is a problem with the 02 sensor circuit- the sensors themselves are apparently fine.i can not think of any connection between the two myself although they told her there is. Have looked on VOSA to see if there was any recalls and have searched the net for any relevant tech service bulletins or campaigns but can't find anything, anyone have any ideas????