P38A Faked mot exhaust sensor

The O2 sensor data looks wrong. They should be switching at similar rates, so maybe it's time to put new ones in ? All the other charts appear ok to me, but it's dificult to tell from the pictures.

As I said before it's generally not recommended, but try cleaning them with Carb Cleaner.

Thanks ordered new one cats be nxt

From that graph, it appears that Bank-A is the bad one, however the Nanocom recording you share indicates Bank-B is not swinging through the correct range. This why we suggested swapping them over & cleaning the connector contacts.

They should normally swing from 0V to 1V on a Thor with Motronic ECU. As the engine revs go up, they swing more often.

How well they work depends on aging of the materials inside, but also on the supply voltage being correct. Bad contacts (i.e. high resistance) in the connectors can reduce the heater voltage, and hence impact how well the sensor works.