Back from the garage. They took one look said it was a blown sensor. Fixed it in 15 minutes and charged me €35 and that’s from an official Opel garage. Relieved.
Funny thing is, the reason I was up early was to get into Santa Eulalia (driving nervously waiting for oil light to come on) to have the blood test which determines whether I’m in remission from cancer. And I was more worried about the car…. Go figure