Thank you for the detail Bryetian. If the lambda sensor reading issue is the case, what is the remedy? Also, this is the first time I have attempted to understand the car‘s motor, and am very grateful for this group! It is a manual by the way.
Am off to the garage that knows the car and feel prepared. Thank you to all who have contributed. I can share the diagnosis once it is sorted, and go bravely toward this new world (for me) of Yeti-tech. Written without irony. This car has 191K kms on it and I hope it lasts at least another 100KWill do.