This car has now had three lambda sensors fitted, the last one was a genuine item, but after about a week it logs fault code P0133 02 sensor B1S1 value change too slow. Freeze frame data as follows.

RPM 2080
MAP 47 KPa
Speed 49 KMH
STFT 3.9
LTFT 3.1

Scoped sensor outputs.


Shown at idle



Shown at 3000 RPM

I'm not very happy with this trace but I'm stumped as to what could cause it. I would of expected it to switch faster and it doesn't look very clean. I'm thinking this could be a software issue. Any comments?