I just checked it hasand one oxygen sensor at the beginning, I
tried to post a picture, but I was not able to do so, its asking for an URL, but it comes from my files, desktop.
The looks original not tampered with, the strange thing is it has an oxygen sensor with heater in the beginning, but it has no exhaust gas pressure sensor and no exhaust gas temp sensor. But the service manual indicated these 2 items. So now I am totally confused.
Most of the time this car is running fine, but once in a while, when idling putting load on, like power steering, AC. and put it in reverse makes that engine will stall.